Oligo/Amenorrhea Is an Independent Risk Factor Associated With Low Ovarian Response.

Capsule: Oligo/amenorrhea is an independent risk factor of low ovarian response but not high ovarian response, particularly in women with low AMH levels.

Objective: To investigate the association of menstrual cycle length (MCL) with anti-Müllerian hormone (AMH) and ovarian response.

Methods: This was a retrospective cohort study.

Vitamin D supplementation prior to in vitro fertilisation in women with polycystic ovary syndrome: a protocol of a multicentre randomised, double-blind, placebo-controlled clinical trial.

Introduction: Polycystic ovary syndrome (PCOS) is one of the leading causes of female infertility, affecting around 5% of women of childbearing age in China. Vitamin D insufficiency is common in women with PCOS and is associated with lower live birth rates. However, evidence regarding the effectiveness of vitamin D supplementation in women with PCOS is inconclusive.