It might be assumed that this procedure would be roughly the same in the higher animals, with perhaps more overt behaviour to achieve synchrony, and that, after the two individuals found each other, fertilization would proceed fairly quickly.
In eukaryotic organisms, development involves cellular events such as mitosis, meiosis, and syngamy (fertilization), which variously proceed by nuclear division (karyokinesis), cytoplasmic division (cytokinesis), cytoplasmic fusion without the union of nuclei (plasmogamy), or nuclear fusion (karyogamy).
To determine whether patients who failed an in vitro fertilization (IVF) cycle can proceed with a subsequent IVF cycle after waiting only one menstrual cycle, or whether there is a benefit to allowing two or more menstrual cycles to elapse before proceeding.
Fertilization was allowed to proceed for 4 h at 37°C in a 5% CO2 incubator.
They got Nickholas when he was 3 days old but decided to proceed with in vitro fertilization, fearing that they might not be able to keep the boy.
Bound to the epithelial lining here, they await ovulation, and very few of them at a time are released to proceed to the ampulla, where fertilization occurs (33).
The AE enables the spermatozoon to proceed with the formation of a fertilization slit and the penetration of the ZP [3].
"This then would allow us to guide the fertility treatment," Wright said, letting affected women proceed directly to a procedure called intracytoplasmic sperm injection involving direct injection of sperm into an egg obtained from in vitro fertilization.
Thus, the hermaphrodite gonad functions like a conveyor belt, with germline nuclei traveling down the length of the arm as they proceed through meiosis, eventually cellularizing, enlarging, and maturing prior to fertilization upon ovulation.
To determine whether in vitro fertilization (IVF) cycles with suboptimal response should be converted to intrauterine insemination (IUI) or proceed to oocyte retrieval (OR).
And once fertilization is accomplished and cell division has begun, the supply of energy in the form of ATP will determine whether the development of the embryo will proceed.
