A few days after fertilization, the fertilized egg (now called a zygote) travels down the fallopian tube and implants itself in the lining of the uterus. Cells continue to divide and the zygote develops into a blastocyst, which will eventually form the embryo.
the embryo attaches the mother
After fertilization, the fertilized egg, now called a zygote, undergoes several cell divisions to form a blastocyst. The blastocyst then implants into the wall of the uterus, where it begins to develop further. This process usually occurs around 6-10 days after fertilization.
The embryo attaches to the mother
The chance of fertilization in humans is restricted to only a few days each month due to the short window of time when the egg is viable after ovulation (about 12-24 hours). Sperm can survive in the female reproductive tract for up to 5 days, but their ability to fertilize the egg decreases over time. This timing helps increase the likelihood of fertilization occurring when both the egg and sperm are present.
In order for fertilization to take place, there must be an egg available to be fertilized. So, fertilization can take place between an egg being released, travelling down the fallopian tube, and arriving at the uterus. Once an egg arrives at the uterus, if it is not fertilized, then the body takes steps to get rid of it (menstruation). It only takes a few days for the egg to get to the uterus after being released, so those few days are the only ones when the egg can be fertilized.
a few days after fertilization
the embryo attaches the mother
A few Days after Fertilization. (apex)
C
After fertilization, the fertilized egg, now called a zygote, undergoes several cell divisions to form a blastocyst. The blastocyst then implants into the wall of the uterus, where it begins to develop further. This process usually occurs around 6-10 days after fertilization.
A few Days after Fertilization. (apex)
basal stem cells.
The endometrium begins to form shortly after the fertilized egg (blastocyst) implants into the uterine wall (endometrium). This typically occurs 3-4 days after fertilization. After implantation, the endometrium is called the Decidua, and basalis is the portion directly under the blastocyst. The Basalis joins the chorionic villi to make the placenta. APEX~ a few days after fertilization
A few days after fertilization, the blastocyst forms as the fertilized egg undergoes several cell divisions and begins to develop. This structure will eventually implant into the uterine wall. At this stage, cells have not yet started differentiating significantly, and the development of the eyes occurs much later in the embryonic process. Therefore, the correct answer is B. The blastocyst forms.
Fertilization can occur if a woman has unprotected sexual intercourse around the time of ovulation, which typically happens about 14 days before the start of her next menstrual period. Sperm can survive in the female reproductive tract for up to 5 days, so conception can happen even if intercourse took place a few days before ovulation.
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