Prospective cohort study in high responder oocyte donors using two hormonal stimulation protocols: impact on embryo aneuploidy and development

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Prospective cohort study in high responder oocyte donors using two hormonal stimulation protocols: impact on embryo aneuploidy and development.

BACKGROUND Ovarian stimulation regimens for in vitro fertilization seem to have a deleterious effect on oocyte quality and embryo aneuploidy in a dose-dependent manner. This study aims to test the influence of gonadotrophin doses on embryo aneuploidy rates. METHODS A total of 32 young oocyte donors with a high response to ovarian stimulation, were included in the study. Two subsequent stimula...

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Impact of ovarian stimulation with gonadotrophins on embryo aneuploidy.

Sir, We have read the article published in your journal by Taylor et al. (2014) with much interest. In this review the authors properly summarize the mechanisms, origins and incidence of chromosomal mosaicism in humans. The review is rigorous, exhaustive and very well-documented, and therefore we congratulate the authors for their work. Nevertheless, we find that some relevant information about...

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Oocyte development, meiosis and aneuploidy.

Meiosis is one of the defining events in gametogenesis. Male and female germ cells both undergo one round of meiotic cell division during their development in order to reduce the ploidy of the gametes, and thereby maintain the ploidy of the species after fertilisation. However, there are some aspects of meiosis in the female germline, such as the prolonged arrest in dictyate, that appear to pre...

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The Effects of Progesterone on Oocyte Maturation and Embryo Development

Oocyte maturation and embryo development are controlled by intra-ovarian factors such as steroid hormones. Progesterone (P4) exists in the follicular fluid that contributes to normal mammalian ovarian function and has several critical functions during embryo development and implantation, including endometrial receptivity, embryonic survival during gestation and transformation of the endometrial...

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Embryo transfer in days 2 to 4 following intracytoplasmic sperm injection: a prospective cohort study

  Background: Improvement of assisted reproductive technique (ART) results in higher pregnancy rates from positive Beta HCG to take home baby statistics. Despite developments in culture media allowing blastocyst stage transfer, some centers apply second, third and sometimes fourth day post injection for embryo transfer. This study aimed to compare their reproductive outcomes.   Methods : This p...

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ژورنال

عنوان ژورنال: Human Reproduction

سال: 2010

ISSN: 0268-1161,1460-2350

DOI: 10.1093/humrep/deq174