Fertility outcomes several years after urgent fertility preservation for patients with breast cancer.

Objective: To study the fertility outcomes of women who tried to conceive after breast cancer (BC) treatment and fertility preservation.

Design: Retrospective observational, bicentric cohort study.

Setting: University hospital.

Impact of oxygen tension during in vitro maturation: a sibling-oocyte prospective double-blinded study.

Objective: To determine whether oxygen (O) tension (20% vs. 5%) has an impact on oocyte maturation rates and morphology during in vitro maturation (IVM).

Design: A prospective, observational, monocentric, sibling-oocyte study.

Should we consider day-2 and day-3 embryo morphology before day-5 transfer when blastocysts reach a similar good quality?

Clinical outcomes of 291 day-5 blastocyst transfers carried out between January 2012 and March 2016 were retrospectively compared according to their quality at day 2 and 3. Inclusion criteria were female age younger than 37 years; first or second IVF and intracytoplasmic sperm injection cycle; quality of the transferred blastocyst: blastocoele B3 or higher; inner-cell-mass A/B; trophectoderm A/B; and known implantation outcome for each transferred blastocyst. Blastocysts were classified into good-quality and poor-quality embryo groups at day 2 and 3.