HOW DO SPERM FIND EGGS AND KNOW WHAT TO DO WHEN THEY FIND THEM?SW, L'HernaultKB, Mercer
It now seems that they can also generate primordial germ cells, which then go on to form sperm and eggs. A fertilized egg is potentially immortal: this fusion of egg and sperm gives risc not only to a new individual, but also (theoretically at least) to an endless series of generations....
How do male birds fertilize eggs? During mating seasons, the cloacal openings of both male and female birds swell and stick out from their bodies. During copulation, they rub their swollen cloacas together. The male's sperm, which has been stored in his cloaca, is deposited into the female...
Once you’re ready to get pregnant, one or more of the eggs will be warmed and assessed. The eggs that survive the freezing process will be fertilized with intracytoplasmic sperm injection (ICSI) — when a single sperm is inserted directly into the egg — with the hope that they become fe...
These risks also pose ethical considerations regarding the use of CRISPR in livestock. Van Eenennaam typically uses "germ-line editing" in livestock, which involves targeting sex cells, like eggs and sperm, or fertilized eggs. This makes CRISPR edits heritable between an animal and its offspring....
I am 45 years old and I had my in vitro test done with a 26 year old egg donor donor and my partner’s sperm. On Wednesday 21/Sep was the transfer of 2 embryos. And I can only hope that God is in control of my life. Thank you if someone tells me what the probability of succ...
Assisted reproduction techniques that involve fertilization of the egg and sperm in the laboratory, subsequently require the transfer of the embryos to deposit them in the woman's uterus. This is the final step of an in vitro fertilization (IVF) treatment, either conventionally or by intracytoplasmi...
Explain the reasons for the differences in genetic makeup between the original cell that undergoes meiosis and the sperm or eggs produced by meiosis. In meiosis, what are the sources of genetic variation? During meiosis, what happens to the matching X-shaped chromosomes?
the longer it may take you to become pregnant. This is largely because egg quality declines over time – especiallyafter age 35. (You were born with all the eggs you'll ever have, and they age as you do.) As years pass, fewer eggs are able to join with sperm to grow into a healt...
For sea urchins or abalone, which cast their gametes to the whims of ocean currents, conflict shapes the interface between sperm and eggs4,5. For organisms with internal fertilization, like birds or insects, conflict can be manifested in how a female chooses who to mate with and, if she ...