Factors influencing the number of mature oocytes and cryopreservable blastocysts in hyperresponder patients triggered with a GnRH analog.

Purpose: This study aimed to investigate which patient and cycle characteristics may affect the number of mature oocytes and cryopreservable blastocysts in the GnRH analog trigger cases.

Methods: This was a retrospective cohort study of 2749 GnRHa trigger cycles in patients at risk of OHSS, including a group of PGT patients, between 2011 and 2020 at Istanbul Memorial Hospital, ART and Reproductive Genetics Center. Patient and cycle characteristics were evaluated using the Generalized Linear Mixed Model (GLMM).

Incidence of multiple births in relation to current regulations in Turkey regarding embryo transfer.

Background: Before 2010, there were no regulations in Turkey regarding the number of embryos to be transferred in one cycle. In March 2010, regulations restricting this number were implemented by the Turkish Ministry of Health. These specify the transfer of a maximum of one embryo in the first and second cycles and a maximum of two embryos in subsequent cycles in women aged < 35, and a maximum of two embryos in women aged ≥35 in any one cycle.

Is there a critical LH level for hCG trigger after the detection of LH surge in modified natural frozen-thawed single blastocyst transfer cycles?

Purpose: There is no consensus yet in the literature on an optimal luteinizing hormone (LH) level for human chorionic gonadotrophin (hCG) trigger timing in patients undergoing frozen-thawed embryo transfer (FET) with modified natural cycles (mNC). The objective of our study was to compare the clinical results of hCG trigger at different LH levels in mNC-FET cases.

Methods: This retrospective study was conducted in Istanbul Memorial Hospital ART and Genetics Center.

The birth of a baby with mosaicism resulting from a known mosaic embryo transfer: a case report.

Mosaic embryos have the potential to implant and develop into healthy babies. The transfer of mosaic embryos is now considered to be a possible option for women undergoing ART with preimplantation genetic testing for aneuploidies and in the absence of euploid embryos, particularly those with diminished ovarian reserve and/or advanced maternal age. It can aid in avoiding the discard of potentially viable embryos, which might otherwise result in healthy babies.

High rates of aneuploidy, mosaicism and abnormal morphokinetic development in cases with low sperm concentration.

Purpose: The aim of our study was to evaluate the impact of severe male infertility (SMF) on the chromosomal status of embryos and any possible correlation between chromosomal status and embryo morphokinetics in younger women using data obtained from comprehensive preimplantation genetic tests.

Methods: The trial was conducted in an ART and Reproductive Genetics Centre between 2011 and 2018. A total of 326 cycles in cases with SMF where the female partner's age was ≤ 35 years were evaluated.

Oocyte Cryopreservation as a Preventive Measure for Age-Related Fertility Loss.

The increased desire to achieve higher educational, career, or financial goals and not having met a suitable partner are the main reasons why women are postponing parenthood to later stages in life. Not being aware of the age-related decline in fertility and the presence of novel and effective fertility preservation strategies are contributing factors to the increased incidence of childlessness at later stages of life. Oocyte cryopreservation has recently been introduced as a means of increasing the probability of motherhood at advanced ages, should attempts at natural conception fail.