Sperm and egg not developing
Fertilization and Embryo Development — Union between the sperm and egg must result. The first sperm, however, are likely not the fertilizing sperm.
Intracytoplasmic sperm injection or "ICSI"
Blighted Ovum: Causes, Symptoms, and More
Feb 6, An illustration of a sperm cell penetrating an egg. of healthy embryos, or the implantation of embryos with development problems, the researchers said.
In some cases, these impaired embryos will not implant in the uterus.
Description:Fate of a Fertilized Egg: Vaginal spotting or bleeding A period that is heavier than usual. Nevertheless, our data seem to support the notion that paternal factors can influence embryo development at this early stage by instigating a weak transcriptional activity, necessary for nucleolar development, in the male pronucleus Interestingly, testicular sperm had a lower incidence of DNA fragmentation than ejaculated sperm. During ovulation, this barrier becomes thinner and changes its acidity, creating a friendlier environment for the sperm.
User Comments 4
Post a comment
Comment: