Release of prostacyclin (PGI2) from trophoblast in tissue culture: the effect of glucose concentration

It is known that short term cell culture system offers a reliable and reproducible means for measuring placental PGI2 production in vitro, in which factors controlling its production and metabolism can be studied. The aim of the present investigation was to study the effect of glucose on generation of PGI2 by trophoblast obtained from early pregnancy in short term cell culture. Trophoblast was cultured using the method of Jogee et al and the concentration of 6-oxo-PGF1 alpha in culture supernatans was measured by a specific direct radioimmunoassay (New England Nuclear, USA). There was a significant decrease in 6-oxo-PGF1 alpha production by trophoblast cells when incubating with increased glucose concentrations (300 and 600 mg/dl) compared to controls (without glucose). These data show for the first time that high concentrations of glucose inhibit PGI2 production by cultured trophoblast cells obtained from early pregnancy. The implication of these findings for the mechanism of development of congenital anomalies in diabetic pregnant women is discussed.     

The significance of prostacyclin produced by pregnant rat myometrium: the relationship between myometrial prostacyclin producing activity and passive stretch of myometrium by growing conceptus

The present experiment was performed to elucidate the significance of prostacyclin (PGI2) produced by pregnant rat myometrium. PGI2-like substance producing activity of various portions of the uterus was measured at selected gestational stages by platelet bioassay; surface area per 1 gm of uterine wall enveloping one conceptus was calculated; and spontaneous contractility of myometrium of both conceptus and non-conceptus regions and the effects of authentic PGI2 on it were examined. PGI2-like substance producing activity increased with advancing pregnancy, but the activity varied according to area of the myometrium, being highest in the area where it was most greatly stretched by the growing conceptus and lowest where no conceptus was contained. Spontaneous contractility was reduced in regions with high PGI2 producing activity. Though authentic PGI2 generally exhibited a stimulatory effect, it had an inhibitory effect on Day 10 pregnant myometrium. From these results, it may be concluded that the producing activity of PGI2, which remarkably increases in the conceptus region with the advance of pregnancy, keeps the uterine wall relaxed, making the uterus adapt to the growth of the fetus. Passive myometrial stretch by the growing conceptus is thought to be one of factors which enhance myometrial PGI2 producing activity.     

Has cervical smooth muscle any physiological role in the human?

Strips of human cervical tissue were obtained by needle biopsy and contractile activity was registered isometrically in a tissue chamber perfused by Krebs-Ringer bicarbonate buffer. The most frequently encountered pattern of contractile activity was high frequency-short duration. Prostaglandin (PG)E2, PGI2 and 6-keto-PGF1 alpha had an inhibitory effect on the muscular activity. Cervical muscle from pregnant women was more sensitive to PGE2 than specimens from non-pregnant women. PGF2 alpha had no apparent effect on cervical contractility in non-pregnant and early pregnant patients. In late pregnancy, however, PGF2 alpha inhibited muscle contractions. The present results point to a physiological role of the cervical muscles for the control of cervical competence during pregnancy. The inhibitory effect of PGs on the muscle activity may promote cervical dilatation and retraction.     

Recognition of nonclassical HLA class I antigens by gamma delta T cells during pregnancy

The healthy trophoblast does not express classical HLA-A and HLA-B products; therefore, an MHC-restricted recognition of trophoblast-presented Ags is unlikely. In the decidua and also in peripheral blood of healthy pregnant women, gammadelta T cells significantly increase in number. We investigated the possible role of gammadelta T cells in recognition of trophoblast-presented Ags. PBL and isolated gammadelta T cells from healthy pregnant women as well as from those at risk for premature pregnancy termination were conjugated to choriocarcinoma cells (JAR) transfected with nonclassical HLA Ags (HLA-E, HLA-G). To investigate the involvement of killer-inhibitory/killer-activatory receptors in trophoblast recognition, we tested the effect of CD94 block on cytotoxic activity of Vdelta2(+) enriched gammadelta T cells to HLA-E- and/or HLA-G-transfected targets. Lymphocytes from healthy pregnant women preferentially recognized HLA(-) choriocarcinoma cells, whereas those from pathologically pregnant patients did not discriminate between HLA(+) and HLA(-) cells. Normal pregnancy Vdelta2(+) T cells conjugated at a significantly increased rate to HLA-E transfectants, whereas Vdelta2(+) lymphocytes from pathologically pregnant women did not show a difference between those and HLA(-) cells. Blocking of the CD94 molecule of Vdelta2(+) lymphocytes from healthy pregnant women resulted in an increased cytotoxic activity to HLA-E-transfected target cells. These data indicate that Vdelta2(+) lymphocytes of healthy pregnant women recognize HLA-E on the trophoblast, whereas Vdelta1 cells react with other than HLA Ags. In contrast to Vdelta2(+) lymphocytes from healthy pregnant women, those from women with pathological pregnancies do not recognize HLA-E via their killer-inhibitory receptors and this might account for their high cytotoxic activity.     

Effect of Ezrin on regulating trophoblast cell invasion via PKC signaling pathway in unexplained recurrent spontaneous abortion

Trophoblast cells are the most important cells in early pregnancy and their invasion are essential to the establishment and maintenance of pregnancy. Inadequate trophoblast cell invasion has been closely associated with several pregnancy-associated diseases including recurrent spontaneous abortion (RSA). Ezrin is an actin-associated protein, known as a marker for carcinogenesis and metastasis in solid tumors, has been proposed to play a role in the formation of microvilli in the early embryo. To further characterize its function in early pregnancy, we explored the expression of Ezrin in the trophoblast cells in early pregnancy. In this study, compared with normal pregnant women, we demonstrated that the expression of Ezrin and phosphorylated Ezrin decreased in the trophoblast cells in unexplained RSA (URSA) patients, and knockdown of Ezrin expression could suppress the invasiveness of trophoblast cells significantly. Various studies indicated that the phosphorylation of Ezrin on C-terminal threonine residue (T567) is a key event in the regulation of its activity. Our further exploration indicated that Ezrin was activated via PKC pathway. Furthermore, inhibition of the PKC pathway by a specific inhibitor suppressed invasiveness of Bewo cells. On the other hand, activation of the PKC pathway could increase the relative capacity of trophoblast cell invasion, while Ezrin knockdown reversed PKC activation induced cell invasion. These findings might provide a new fundamental mechanism for successful pregnancy and new diagnostic and therapeutic target for RSA.     

Porcine conceptus proteins: antiviral activity and effect on 2',5'-oligoadenylate synthetase.

Interferon-like proteins synthesized by conceptuses of domestic ruminants inhibit luteolysis during early pregnancy. Although pig conceptuses secrete trophoblast interferons during the period of CL maintenance, estrogen is involved with maintenance of the CL. The principal purposes of this work were to confirm production of trophoblast interferons by porcine conceptuses and to compare the effect of trophoblast interferons on endometrium of pigs and cattle. When measured using Madin-Darby bovine kidney (MDBK) cells challenged with vesicular stomatitis virus, antiviral activity in uterine flushings from cyclic gilts was not detectable throughout the estrous cycle; however, in pregnant gilts, antiviral activity increased from undetectable amounts to 4-11 x 10(3) U on Days 14, 16, and 18. Porcine embryos in culture produced 1,100 U/embryo/ml/24 h. Porcine conceptus secretory proteins induced 2',5'-oligo(A) synthetase in MDBK cells and in endometrial explants of cows but had no measurable effect on 2',5'-oligo(A) synthetase activity of endometrial explants of pigs. Similarly, endometrial 2',5'-oligo(A) synthetase of pregnant pigs was unaffected in vivo during the period of maximal synthesis of conceptus secretory proteins. Porcine conceptus secretory proteins produced no detectable increase in serum antiviral activity or 2',5'-oligo(A) synthetase activity of blood mononuclear leukocytes in utero-ovarian venous blood. These results suggest that conceptus interferons of pigs play different roles in the establishment of pregnancy compared to their roles in ruminants.     

Strategic use of gonadotrophin-releasing hormone (GnRH) to increase pregnancy rate and reduce pregnancy loss in lactating dairy cows subjected to synchronization of ovulation and timed insemination

The objective of this study was to determine the effect of GnRH (100 microg i.m.) treatment 5 and 15 days after timed insemination (TAI) on pregnancy rate and pregnancy loss in lactating dairy cows subjected to synchronization of ovulation. The study included 831 lactating dairy cows subjected to a Presynch-Ovsynch protocol for first service. On the day of TAI (Day 0), cows were randomly assigned to one of four experimental groups. Cows in Group 1 (n = 214) were treated with GnRH on Day 5; cows in Group 2 (n = 209) were treated with GnRH on Day 15; cows in Group 3 (n = 212) were treated with GnRH on both Day 5 and Day 15; cows in Group 4 (n = 196) were not treated. Pregnancy rate was evaluated at Day 27 and Day 45 after TAI. The interestrus interval and the proportion of cows diagnosed not pregnant based on expression of estrus and insemination before pregnancy diagnosis on Day 27 were determined. The results of this study are: (1) GnRH treatment on Day 5 or Day 15 did not increase pregnancy rate, or reduce pregnancy loss between Day 27 and Day 55 after TAI; (2) cows treated with GnRH on both Day 5 and Day 15 had a lower (P < 0.01) proportion of cows diagnosed not pregnant based on expression of estrus before ultrasonography on Day 27 (26.5%) compared to control cows (52.9%), and these cows had an extended (P = 0.05) interestrus interval (23.4 days vs. 21.5 days); and (3) GnRH treatment on both Day 5 and Day 15 after TAI reduced pregnancy rate on Day 27 (36.8% vs. 44.4% for control cows; P < 0.03) and Day 55 (28.3% vs. 36.2% for control cows; P < 0.01). Therefore, strategies to stimulate CL function using multiple doses of GnRH during the luteal phase need to consider potential negative effects.     

French Pregnancy Physical Activity Questionnaire compared with an accelerometer cut point to classify physical activity among pregnant obese women

Given the high risk for inactivity during pregnancy in obese women, validated questionnaires for physical activity (PA) assessment in this specific population is required before evaluating the effect of PA on perinatal outcomes. No questionnaire was validated in pregnant obese women. The Pregnancy Physical Activity Questionnaire (PPAQ) has been designed based on activities reported during pregnancy and validated in pregnant women. We translated the PPAQ to French and assessed reliability and accuracy of this French version among pregnant obese women. In this cross-sectional study, pregnant obese women were evenly recruited at the end of each trimester of pregnancy. They completed the PPAQ twice, with an interval of 7 days in-between, to recall PA of the last three months. Between PPAQ assessments, participants wore an accelerometer (Actigraph GT1M) during 7 consecutive days. Fourty-nine (49) pregnant obese women (29.8±4.2 yrs, 34.7±5.1 kg x m(-2)) participated to the study. The intraclass correlation coefficients (ICCs) between the two PPAQ assessments were 0.90 for total activity, 0.86 for light and for moderate intensity, and 0.81 for vigorous intensity activities. It ranged from 0.59 for "Transportation" to 0.89 for "Household and Caregiving" activities. Spearman correlation coefficients (SCCs) between the PPAQ and the Matthews' cut point used to classify an activity of moderate and above intensity were 0.50 for total activity, 0.25 for vigorous intensity and 0.40 for moderate intensity. The correlations between the PPAQ and the accelerometer counts were 0.58 for total activity, 0.39 for vigorous intensity and 0.49 for moderate intensity. The highest SCCs were for "Occupation" and "Household and Caregiving" activities. Comparisons with other standard cutpoints were presented in files S1, S2, S3, S4, S5, S6, S7. The PPAQ is reliable and moderately accurate for the measure of PA of various intensities and types among pregnant obese women.     

Microsomal preparations of normal bovine iris-ciliary body generate prostacyclin-like but not thromboxane-A2-activity.

Indomethacin-treated bovine iris-ciliary body microsomes (IBIM) have been studied for their ability to convert PG endoperoxides into either thromboxane-A2 (TxA2)-like or prostacyclin (PGI2)-like activity. The biological activity of the ocular tissue microsomes were compared with either indomethacin-treated human platelet microsomes (for TxA2-like activity) or rabbit aorta microsomes (for PGI2-like activity) under appropriate incubation conditions. No evidence could be found for the formation of TxA2-like activity from PG endoperoxides by the IBIM. In contrast, when the IBIM were incubated with PGH2 for 1 min at 22 degrees C without cofactors, PGI2-like activity was produced, causing profound relaxation of the isolated dog coronary artery preparation without contracting the rabbit aorta and inhibiting arachidonic acid-induced platelet aggregation. Equivalent quantities of boiled IBIM failed to alter the biological activity of PGH2 under identical conditions. Tranylcypromine (500 microgram/ml) completely abolished the appearance of PGI2-like activity. Furthermore, the PGI2-like activity found was stable for 10 min at 22 degrees C at pH 8.5 but completely lost under similar conditions at pH 5.5. It is concluded that microsomal preparations of normal bovine iris-ciliary body can synthesize PGI2-like activity in substantial amounts but not TxA2-like activity.     

Maternal and feto-placental prostanoid responses to a single course of antenatal betamethasone

We tested the hypothesis that antenatal betamethasone alters prostanoid levels in the maternal and feto-placental compartments. Forty-three singleton pregnancies were studied. Group I were women treated with a single course of antenatal betamethasone and who delivered <37 weeks gestation; Group II were untreated women who delivered <37 weeks; and Group III were untreated women who delivered >38 weeks. Maternal and mixed cord blood; and placental samples were collected at delivery and analyzed for PGE2, PGF(2alpha), 6-ketoPGF(1alpha), and TxB2 levels. Antenatal betamethasone decreased maternal PGE2 levels with concomitant increases in the feto-placental compartment. Umbilical cord TxB2 levels in the treated group were significantly lower than the non-treated pre-term and term groups resulting in a higher 6-ketoPGF(1alpha):TxB2 ratio. Considering the regulatory role of PGE2 and PGI2 in fetal lung development and neonatal transition homeostasis, these results suggest a mechanism, at least in part, for the beneficial effects of antenatal steroids on fetal lung maturation and neonatal cardio-pulmonary homeostasis at birth.     

血清妊娠相关血浆蛋白A在诊断异常妊娠中的临床意义

目的:探讨血清妊娠相关血浆蛋白A(PAPP-A)在诊断异常妊娠中的临床意义,分析其与异常妊振的关系。方法:选取299例5~13周的正常早孕妇为正常早孕组,同期选取稽留流产86例,先兆流产54例,异位妊娠76例为异常妊娠组,用酶联免疫吸附试验(ELASA)测定两组受试者的血清PAPP-A水平,分析两组受试者各个孕周内的血清PAPP-A水平的差异。结果:稽留流产孕妇在各个孕周内(9~13周)的血清PAPP-A水平显著低于同孕周内正常早孕孕妇(t值分别为9.500,8.113,3.511,9.538,8.504,P值均0.05);稽留流产孕妇总的平均血清PAPP-A水平亦低于常早孕孕妇(t=3.651,P值均0.05);异位妊娠孕妇在各个孕周内(9~13周)的血清PAPP-A水平显著低于同孕周内正常早孕孕妇(t值分别为7.976,9.030,9.941,11.625,14.079,12.569,P值均0.05),异位妊娠孕妇总的平均血清PAPP-A水平亦低于常早孕孕妇(t=28.168,P值均0.05);先兆流产孕妇(除孕8周)与正常早孕妊娠血清PAPP-A水平比较无显著统计学意义。结论:血清PAPP-A水平在异常妊娠如异位妊娠、稽留流产中显著降低,可作为诊断异位妊娠、稽留流产及先兆流产辅助诊断的生物学指标。     

15(S)15-methyl prostaglandin F2alpha for termination of very early human pregnancy. A comparative study of a single intramuscular injection and vaginal suppositories.

The results of a comparative study of the efficacy and acceptability of 15(S)15-methyl prostaglandin F2alpha (15-Me-PGF2alpha) administered as a single i.m. injection or vaginal suppositories (15-Me-PGF2alpha methyl ester) every 3rd hr for termination of very early human pregnancy is reported. The amenorrhoic period varied from 37 to 60 days. Group I (30 cases) received 0.6 mg as a single i.m. injection without any pretreatment. Retrospectively 24 of the 30 women were in fact pregnant and 22 of them aborted. Group II received suppositories (1.0 or 1.5 mg per suppository). In this group all women were pregnant and they all aborted. Symptoms such as pain, bleeding, vomiting and diarrhea started in general earlier in the i.m. group and they were more marked. In the present series the efficacy and acceptability were highest for the vaginal route of administration.     

Effect of the stage of pregnancy and post-partum on the number of gonadotrophin responsive follicles in ewes

The present study was designed to study follicular growth and its interactions with the corpus luteum of pregnancy in sheep during early, middle and late pregnancy and during postpartum anestrus. Ewes with 1 or 2 corpora lutea in one ovary were selected from a larger group of Serres ewes. All pregnant ewes were randomly allocated to two groups, with 10 to 12 ewes per group. Ewes of Group I were treated with 750 IU hCG at Day 25 or 45 or 70 or 100 or 125 of pregnancy. In Group II, ewes were treated with a combination of 1000 IU PMSG + 750 IU hCG either at Day 25 or 45 or 70 or 100 of pregnancy. The results demonstrated the presence of gonadotrophin-responsive follicles during early pregnancy (Days 25 to 45), reduction of their number during mid-pregnancy (Days 70 to 100), and their disappearance during late pregnancy (Day 125). Administration of hCG to Serres ewes at 10 and 20 days postpartum induced ovulation of a high proportion of ewes at 10 days postpartum (62%) with a further increase observed at 20 days postpartum (75%). During pregnancy, as well as during the postpartum period, there was no significant difference in the number of ovulations induced according to the location of the corpus luteum of pregnancy. These data demonstrate that the presence of the corpus luteum of pregnancy does not affect the number of gonadotrophin-responsive follicles until Day 100 of pregnancy. However, during late pregnancy such follicles were no longer present in the ovaries. Gonadotrophin-responsive follicles were again present as soon as Day 10 postpartum.     

胰岛素对不同孕期妊娠糖尿病患者血糖水平及妊娠结局的影响

目的:探讨胰岛素对不同孕期妊娠合并糖尿病孕产妇血糖水平及妊娠结局的影响。方法:选择2011年7月-2015年4月在我院接受治疗的妊娠期糖尿病患者200例,均采用胰岛素治疗。检测患者血糖变化、妊娠期并发症的发生情况,并分析孕期对胰岛素治疗效果的影响。结果:治疗后产妇空腹血糖及餐后2 h血糖均低于治疗前,差异具有统计学意义(P0.05);孕期32周的产妇治疗后空腹血糖及餐后2 h血糖均低于孕期≥32周的产妇,差异具有统计学意义(P0.05)。孕期32周的产妇妊娠高血压及产后出血的发生率均低于孕期≥32周的产妇,但早产及剖宫产的发生率高于孕期≥32周的产妇,差异具有统计学意义(P0.05)。结论:胰岛素治疗能够有效控制妊娠期糖尿病产妇的血糖水平,改善妊娠结局,早期干预效果较好。     

The effect of uterine stretch on first trimester abortions induced by extraovular prostaglandin impact

In 20 obstetrically normal 1st trimester pregnant volunteers abortion had been induced successfully in 19, by Prostaglandin-Impact (PGI) technique (1). A total average dose of 12.3±0.9 mg PG F2α, delivered into the extraovular (E.O.) space, reduced the plasma P levels from an initial value of 29.4±2.5 ng/ml to 12.8±1.6 ng/ml (P < 0.001) within 17.4±1.6 hours instillation-abortion time (IAT). Of the 20 women 13 aborted completely, 6 incompletely, and 1 progressed to 2 cm cervical dilatation: yielding an “Abortion Score” (AbS) of 86.0±4.6.Of the 20 gravidas, 10 only received PGI (Control Group), while the remaining 10 were exposed to uterine stretch, in addition to PGI (Experimental Group). Stretch had been accomplished by a “stretch balloon” filled with 200 ml saline. Comparing the Control and Experimental Groups revealed that stretch shortens the IAT and improves the AbS. This effect is very probably achieved through a stretch induced increase in the endogenous PG-synthesis of the uterus (1). This preliminary finding exposes the possibility, that pregnancy termination can be promoted by an increased involvement of endogenous PGs in the activation of the myometrium, provoked through stretch. The validity of this premise is under current examination.     

Polyunsaturated fatty acids differentially alter PGF(2alpha) and PGE(2) release from bovine trophoblast and endometrial tissues during short-term culture

Two studies tested the hypothesis that eicosapentaenoic (20:5omega3; EPA), docosahexaenoic acids (22:6omega3; DHA) or linoleic acid (C18:2omega6; LIN) reduced bovine endometrial and trophoblast prostaglandin F(2alpha) (PGF(2alpha)) and prostaglandin E(2) (PGE(2)) release during short-term culture. In Study 1, endometrial tissues were collected from non-lactating, non-pregnant cows and endometrial plus trophoblast tissues from pregnant cows 16 days post-insemination. In Study 2, endometrial and trophoblast tissues were collected on day 17 of pregnancy, from cows synchronised using a double prostaglandin (PG) or Ovagentrade mark synchronisation. Tissues were incubated in medium only (M) or media supplemented with fatty acids: eicosapentaenoic (20:5omega3; EPA), docosahexaenoic acids (22:6omega3; DHA) or linoleic acid (C18:2omega6; LIN). In Study 1, PGE(2) release from 'pregnant' endometria was higher (P=0.094) than from 'non-pregnant' endometria, while PGF(2alpha) concentrations were similar. Fatty acids treatment had no effect on PGF(2alpha) or PGE(2) release from either pregnant or non-pregnant endometria. Individual fatty acid treatments had no effect on the ratio of PGF(2alpha) to PGE(2) from trophoblast tissues, but when the data from the 3 fatty acid treatments were combined (EPA, DHA and LIN treatment groups) the ratio of PGF(2alpha) to PGE(2) was reduced (P=0.026) when compared to medium only. In Study 2, PGE(2) concentrations were higher (P=0.013) from the trophoblast collected from Ovagentrade mark cows as compared to that of the PG synchrony group. When the data from the 3-omega fatty acids were combined (DHA and EPA treatment groups), the 3-omega treatments decreased (P<0.05) PGE(2) biosynthesis from both endometrial and trophoblast tissues from animals synchronised following PG synchrony but not Ovagentrade mark synchrony. Short-term culture with low concentrations of 3-omega fatty acids tended to reduce prostaglandin release from trophoblast collected 16 days after insemination, with the type of synchrony modifying PGE(2) production from the trophoblast tissues collected 17 days after insemination. The ability of exogenous fatty acids to modify embryonic prostaglandin release needs to be examined in the context of supplementing dairy cows with different sources of fats. Synchronisation method altered trophoblast PGE(2) release, highlighting the importance of the hormonal environment in modifying embryonic prostaglandin synthesis and release.     

Clinical and immunologic evaluation of women with multiple sclerosis during and after pregnancy

Background: Multiple sclerosis (MS) is a disabling autoimmune disease of the central nervous system, typically affecting women of childbearing years. Although the disease course of MS is highly unpredictable, disease activity is almost invariably halted during pregnancy. After delivery, however, the relapse rate increases. Despite early recognition of this pattern of disease activity, its explanation remains a mystery.Objective: The aim of this study was to elucidate the underlying mechanisms responsible for the amelioration of MS during pregnancy and for its reactivation after delivery.Methods: This Finnish prospective study included clinical and immunologic follow-up of patients with MS during pregnancy and 6 months into the postpartum period. Groups of patients with MS who were not pregnant, along with pregnant and nonpregnant healthy women, served as controls. Laboratory investigations included subtype analysis of T, B, and natural killer (NK) cells during and after pregnancy, using immunofluorescence staining and fluorescence-activated cell sorting analysisResults: The clinical and immunologic follow-up data from 42 pregnant patients with MS indicated that the percentage of circulating NK cells decreases during the last trimester of pregnancy and increases again soon after the delivery. This correlates with disease activity as measured by annualized relapse rate. Early postpartum treatment with interferon-0 was effective in preventing relapses, and good response to postpartum treatment coincided with a reduction in the circulating NK cell levels.Conclusions: Our findings have implications for the treatment and follow-up of pregnant women with MS. To prevent postpartum relapses, disease-modifying treatment should be initiated as early as possible.     

早期异位妊娠患者经阴道彩色多普勒示可疑妊娠滋养细胞流动与血清甲胎蛋白水平的相关性

摘要 目的：探究早期异位妊娠患者经阴道彩色多普勒示可疑妊娠滋养细胞流动与血清甲胎蛋白水平的相关性。方法：选择2021年1月至12月在本院收治的100例早期异位妊娠患者为观察研究对象。并选择同时期在本院例行正常产检的100例宫内妊娠孕妇为对照组。所有受试者进行阴道超声检查和彩色多普勒检查,并抽血进行甲胎蛋白的定量测定。测定子宫动脉、滋养细胞血流阻力及血清甲胎蛋白含量。结果：观察组腹痛、阴道不规则出血发生率较对照组升高（P<0.05）。观察组收缩期峰值速速、舒张末期速度较对照组升高,观察组滋养细胞血流阻力指数RI较对照组降低（P<0.05）。观察组收缩期峰值速速、舒张末期速度较对照组升高,观察组子宫动脉血流阻力指数RI较对照组降低（P<0.05）。观察组血清甲胎蛋白含量较对照组升高（P<0.05）。异位妊娠患者血清甲胎蛋白与滋养细胞血流RI呈负相关（r=-0.425,P<0.001）。结论：早期异位妊娠患者血清甲胎蛋白升高,经阴道彩色多普勒检查显示滋养细胞存在高流量-低阻力血管,滋养细胞血流阻力RI与血清甲胎蛋白呈负相关。