OBJECTIVES: To summarize the literature on the rediscovery and clinical exploration of the fourth natural estrogen estetrol (E4), more than 100 years after the discovery of estrone (E1), estradiol (E2), and estriol (E3). METHODS: Literatur…
Background: Infertility remains a significant global health challenge, affecting approximately 15% of couples worldwide. In vitro fertilization (IVF) has transformed reproductive medicine; however, challenges such as low success rates in ol…
Ultrasound monitoring and hormonal blood testing are considered by many as an accurate method to predict ovulation time. However, uniform and validated algorithms for predicting ovulation have yet to be defined. Daily hormonal tests and tra…
The COVID-19 pandemic has claimed the lives of over one million people worldwide, and has affected all aspects of healthcare worldwide, including the delivery of care to patients with fertility-related diagnoses. In the United States, the r…
STUDY QUESTION: What proportion of fertilized human ova are lost before implantation? SUMMARY ANSWER: An estimated 40 to 50% of fertilized ova fail to implant. WHAT IS KNOWN ALREADY: Preimplantation loss is not detectable with current tec…
The purpose of this Commentary is to assess whether the designation by New York State Department of Health of 'sexual and reproductive health services as essential' is consonant with the seemingly divergent objectives of providing patient-c…
Oral clomiphene citrate (CC) and vaginal progesterone suppositories (PS) are common treatment modalities in luteal phase dysfunction (LPD). Little is known regarding the relative efficacy of these agents. To study the use of CC and PS in th…
Chronic and transient hyperprolactinemia have been associated with luteal phase dysfunction in both spontaneously cycling women and those subjected to ovarian hyperstimulation by exogenous gonadotropins. It is the objective of the in vitro …
The direct effects of danazol on granulosa cell differentiation were studied in vitro over a broad concentration range with a primary culture of rat granulosa cells. Whereas treatment with low-dose (defined herein as less than 10(-6) M) dan…