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What does DAF stand for?

DAF stands for days after fertilisation


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Thalidomide causes damage to the embryo in a short time window of development (also referred to as the “critical period”) between 20 and 36 days after fertilisation, or 34 to 50 days after the last menstrual period [7, 11, 25]. Exposure to thalidomide from 36 days after fertilisation has no apparent outward morphological effect upon the embryo/fetus [7, 14]. In contrast, thalidomide exposure before the time-sensitive window of development can induce miscarriage in humans and rats [9, 43].
Its use 'conception' by some to refer to implantation makes it a subject of semantic arguments about the beginning of pregnancy, typically in the context of the abortion debate. Upon gastrulation, which occurs around 16 days after fertilisation.
[58] Embryo culture until the blastocyst stage confers a significant increase in live birth rate per embryo transfer, but also confers a decreased number of embryos available for transfer and embryo cryopreservation, so the cumulative clinical pregnancy rates are increased with cleavage stage transfer. [22] Transfer day two instead of day three after fertilisation.