Pregnancy Outcomes of In Vitro Fertilization with or without Ovarian Hyperstimulation Syndrome: A Retrospective Cohort Study in Chinese Patients / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>The effect of ovarian hyperstimulation syndrome (OHSS) on pregnancy outcomes of in vitro fertilization (IVF) patients is still ambiguous. This study aimed to analyze pregnancy outcomes of IVF with or without OHSS in Chinese patients.</p><p><b>METHODS</b>A retrospective cohort study was undertaken to compare pregnancy outcomes between 190 women with OHSS and 197 women without OHSS. We examined the rates of clinical pregnancy, multiple pregnancies, miscarriage, live birth, preterm delivery, preterm birth before 34 weeks' gestation, cesarean delivery, low birth weight (LBW), and small-for-gestational age (SGA) between the two groups. Odds ratios (OR s) and 95% confidence intervals (CI s) of measure of clinical pregnancy were also analyzed.</p><p><b>RESULTS</b>The clinical pregnancy rate of OHSS patients was significantly higher than that of non-OHSS patients (91.8% vs. 43.5%, P < 0.001). After controlling for drug protocol and causes of infertility, the adjusted OR s of moderate OHSS and severe/critical OHSS for clinical pregnancy were 4.65 (95% CI, 1.86-11.61) and 5.83 (95% CI, 3.45-9.86), respectively. There were no significant differences in rates of multiple pregnancy (4.0% vs. 3.7%) and miscarriage (16.1% vs. 17.5%) between the two groups. With regard to ongoing clinical pregnancy, we also found no significant differences in the rates of live birth (82.1% vs. 78.8%), preterm delivery (20.9% vs. 17.5%), preterm birth before 34 weeks' gestation (8.6% vs. 7.9%), cesarean delivery (84.9% vs. 66.3%), LBW (30.2% vs. 23.5%), and SGA (21.9% vs. 17.6%) between the two groups.</p><p><b>CONCLUSION</b>OHSS, which occurs in the luteal phase or early pregnancy in IVF patients and represents abnormal transient hemodynamics, does not exert any obviously adverse effect on the subsequent pregnancy.</p>

Factors Associated with Effectiveness of Treatment and Reproductive Outcomes in Patients with Thin Endometrium Undergoing Estrogen Treatment / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Thin endometrium is associated with poor reproductive outcomes; estrogen treatment can increase endometrial thickness (EMT). The aim of this retrospective cohort study was to investigate the factors influencing the effectiveness of estrogen treatment and reproductive outcomes after the treatment in patients with thin endometrium.</p><p><b>METHODS</b>Relevant clinical data of 101 patients with thin endometrium who had undergone estrogen treatment were collected. Possible factors influencing the effectiveness of treatment were analyzed retrospectively by logistic regression analysis. Eighty-seven infertile women without thin endometrium who had undergone assisted reproduction served as controls. The cases and controls were matched for age, assisted reproduction method, and number of embryos transferred. Reproductive outcomes of study and control groups were compared using Student's t-test and the Chi-square test.</p><p><b>RESULTS</b>At the end of estrogen treatment, EMT was ≥8 mm in 93/101 patients (92.1%). Effectiveness of treatment was significantly associated with maximal pretreatment EMT (P = 0.017) and treatment duration (P = 0.004). The outcomes of assisted reproduction were similar in patients whose treatment was successful in increasing EMT to ≥8 mm and the control group. The rate of clinical pregnancy in patients was associated with the number of good-quality embryos transferred in both fresh (P = 0.005) and frozen-thawed (P = 0.000) embryo transfer cycles.</p><p><b>CONCLUSIONS</b>Thinner EMT before estrogen treatment requires longer treatment duration and predicts poorer treatment outcomes. The effectiveness of treatment depends on the duration of estrogen administration. Assisted reproductive outcomes of patients whose treatment is successful (i.e., achieves an EMT ≥8 mm) are similar to those of controls. The quality of embryos transferred is an important predictor of assisted reproductive outcomes in patients treated successfully with exogenous estrogen.</p>

Clinical applications of anti-Müllerian hormone in evaluating ovarian reserve functions / 中国医学科学院学报

Anti-Müllerian hormone (AMH) is a member of the transforming growth factor (TGF)-beta superfamily and mainly expressed by the granulosa cells of ovarian follicles. In women AMH is only expressed in ovarian follicles and therefore can be used for the evaluation of the ovarian reserve function and the prediction of ovary ageing and ovarian response during in vitro fertilization (IVF) treatment. This article summarizes the clinical application of AMH, especially in evaluating ovarian reserve functions.

Application of vitrification of human oocytes and embryos at different developmental stages / 中国医学科学院学报

Vitrification of human oocytes and embryos has become an important assisted reproductive technology. It can be used to cryopreserve immature oocytes, mature oocytes, pronuclear embryos, blastomeres, and blastocysts. This article reviewed the clinical application of vitrification of human oocytes and embryos at different developmental stages.

Superovulation and intrauterine insemination in treatment of idiopathic infertility in 202 cycles / 中国医学科学院学报

<p><b>OBJECTIVE</b>To evaluate the effect of superovulation with recombinant follicle stimulating hormone (r-FSH) therapy and intrauterine insemination in the treatment of idiopathic infertility.</p><p><b>METHODS</b>Superovulation with r-FSH therapy and intrauterine insemination were used in 202 cycles of 88 couples in the Department of Obstetrics and Gynecology of Monash Medical Centre.</p><p><b>RESULTS</b>The per cycle ovulation rate and in-ovulation rate were 95.7% and 4.3% respectively, and the per cycle pregnancy rate was 11.6% with no cases of hyperstimulation. The cancelling rate was 7.4% because of the development of multiple follicles. The overall cumulative conception rate was 22.7% per patient, with 15% of twin pregnancies. There were no differences between pregnancy group and non-pregnancy group in age, BMI, treatment days, number of mature follicles, endometrial thickness and number of treatment cycles. The only significant parameter observed between the two groups was infertility time (P < 0.05), which was longer in non-pregnancy group [(30.52 +/- 13.08) months] than in pregnancy group [(24.25 +/- 6.45) months].</p><p><b>CONCLUSIONS</b>Superovulation and intrauterine insemination is a safe and more cost-effective method in treatment of idiopathic infertility.</p>

Urinary endometriosis / 中国医学科学院学报

<p><b>OBJECTIVE</b>Aimed at illustrating the means of early diagnosis for prevention of the impairment of kidney function, the results of conservative medical therapy and the surgical treatment in patients with endometriosis of urinary tract.</p><p><b>METHODS</b>Surgical interventions were done in 5 cases with pathological of endometriosis. Ureters were involved by endometriotic lesion in 3 patients, ureters and bladder in one and urethra in another patient. All of the cases were shown at least partial obstruction of the urinary tract by clinical symptoms, diagnostic examinations and the outcomes of various kinds of treatment.</p><p><b>RESULTS</b>Hydropnephrosis and hydroureter were shown by ultrasonography, IVP or retrograde pyelography in one case of ureteral obstruction. A small lump of endometriotic foci along the urethra was detected by manual examination and ultra-sonography in one patient. The relieving of the symptoms and signs of the obstruction of the urinary tract in two cases by GnRH-a or progest in was the evidence of the endometriotic lesion. There were two patients underwent surgical resection of the endometriotic foci surrounding the ureter after medical therapy.</p><p><b>CONCLUSIONS</b>Urinary tract endometriosis are rarely seen and usually escape the attention of the physicians, while they usually cause obstruction of the urinary tract and finally impairment of kidney function if not treated in time. This kind of disease can be easily diagnosed by imaging detection with ultra-sonography, IVP or retrograde pyelography. Conservative treatment with GnRH-a and long acting progesterone as well as surgical treatments are effective for this kind of disease.</p>

Effect of premenopausal hysterectomy on ovarian function / 中国医学科学院学报

<p><b>OBJECTIVE</b>To investigate the influence of premenopausal hysterectomy on the function of the conserved ovaries.</p><p><b>METHODS</b>A retrospective survey was conducted by sending questionnaire to 521 cases of hysterectomized women (with the conservation one or two ovaries) for benign gynecological diseases and 1,600 cases of normal controls (with contact uterus and bilateral ovaries). Age, type of operation, diagnosis and the time of the onset of the menopausal syndrome were asked in the questionnaire.</p><p><b>RESULTS</b>The mean age of the onset of the hot flush (293 cases) in the hysterectomized group was (44.64 +/- 4.31) years, which was significantly lower than that of the normal group [(46.87 +/- 4.22) years, 197 cases] (P < 0.01). The mean age of the above 293 women undergoing hysterectomized was (42.84 +/- 4.37) years. The range of the operation was positively correlated with the time of the onset of the menopause syndrome. So there was only (1.99 +/- 2.40)-year interval between the hysterectomy and the onset of the hot flush.</p><p><b>CONCLUSION</b>Hysterectomy with the conservation of bilateral/unilateral ovaries may have some certain influence on ovarian function.</p>