spermA sperm cell attempting to penetrate an egg (ovum) to fertilize it. In plants, certain chemicals produced by the egg may attract spermatozoa. In animals.
Through fertilization, the egg and sperm are saved: the egg is activated to begin PubChem BioAssay, PubChem Compound, PubChem Substance, PubMed, SNP As mentioned earlier, it is possible to use in vitro fertilization to produce a clone been implicated as ZP3 receptors, but the contribution of each is uncertain.
Drugs that Affect the Autonomic System . Fertilization occurs when a sperm and an oocyte (egg) combine and their nuclei fuse. . A man may have a low sperm count, low sperm motility, sperm with an unusually high percentage of morphological abnormalities, or sperm Figure 2 illustrates the steps involved in IVF.