Chen, Valerie

Objectives The effect of ovarian reserve on expected in vitro fertilisation (IVF) attrition remains controversial. This study analyses IVF attrition rates based on ovarian reserve and stimulation protocol to create customised pre-treatment counselling tools for assisting clinicians in setting accurate patient expectations. Material and Methods We completed a retrospective chart review of 18–44-year-old patients who underwent IVF treatment at a single academic institution between January 1, 2013, and March 23, 2023. Cycle outcomes, number of retrieved oocytes, mature oocytes, fertilised embryos, and blastocysts were analysed for patients with polycystic ovary syndrome (PCOS), unexplained infertility, and diminished ovarian reserve (DOR). A Poisson regression model was used to compare oocyte maturation, fertilisation, and blastulation rates among groups, adjusted for age, body mass index, race, and insemination method. Results Three hundred and thirteen couples underwent a total of 385 IVF cycles analysed in this study. There were 109 patients who underwent 120 cycles in the unexplained infertility group (31% cycles), 133 patients with 143 cycles in the PCOS group (37% cycles), 40 patients with 45 cycles in the DOR antagonist stimulation group (12% cycles), and 39 patients with 77 cycles in the DOR minimal stimulation group (20% cycles). No differences in oocyte maturation, fertilisation, or blastulation rate were seen among PCOS or DOR antagonist cycle groups when compared to unexplained infertility. After adjusting for confounders, blastulation rate was higher for the DOR minimal stimulation group compared to unexplained infertility (1.37-fold change, p = 0.04). Conclusion Rates of oocyte maturation, fertilisation, and blastulation were similar among all antagonist protocol cycles regardless of ovarian reserve. However, patients with DOR who undergo minimal stimulation may have modestly higher blastulation rates compared to DOR patients who undergo the antagonist protocol.

INTRODUCTION: Several methods exist for diagnosis of preterm premature rupture of membranes (PPROM), including pooling on speculum exam, nitrazine test, arborization under microscopy, immunoassay, and amnio-dye test. Diagnostic accuracy is particularly important for PPROM because a missed diagnosis may result in life-threatening maternal and fetal consequences. We present a novel method for evaluating PPROM in equivocal cases using a menstrual cup. METHODS: Written informed consent was obtained for submission of a case report. A 36-year-old G6P5005 at 29 2/7 weeks presented with leakage of fluid. She was found to have negative pooling on speculum exam, negative arborization on microscopy, a maximum vertical pocket (MVP) of 4.0 cm, and a negative urinalysis. She was discharged with precautions and returned 2 days later with persistent symptoms. Workup again showed no pooling, no arborization, and a normal MVP. The patient suggested using a menstrual cup to capture her intermittent leakage of fluid. She wore a menstrual cup for 30 minutes in triage. A sample of the fluid tested positive for arborization. She was admitted to labor and delivery for latency antibiotics, betamethasone, and fetal and maternal monitoring. CONCLUSION: Preterm premature rupture of membranes can occur without overt vaginal pooling due to small volume leakage. Conventional testing is less sensitive when pooling is absent. In these cases, a menstrual cup may help facilitate diagnosis and avoid invasive tests such as the amnio-dye test. Care must be taken to use a clean menstrual cup without gel, limit the duration of menstrual cup use to avoid infection, and to distinguish arborization of amniotic fluid from that of cervical mucus.