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Sperm have various stage. First and Second Stage. Both stage is capable of producing fertilization depending on the cycle or the period of the female. First stage: at this stage the male is not aware of that, Second stage: it's the stage we are well of. That is, if the female is not in safe period, first stage can make her pregnant as well.
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The first period of prenatal development is the germinal stage, which lasts for the first two weeks after conception. During this stage, the fertilized egg, or zygote, undergoes rapid cell division and eventually forms a blastocyst. The blastocyst implants itself into the uterine wall, marking the end of the germinal stage.
The first stage is jettisoned, to fall back to earth, as the fuel runs out.
you obsorve air
menstruation
The first stage is jettisoned, to fall back to earth, as the fuel runs out.
its the first stage of pregnancy and last the first 3 months..
The embryonic stage is a part of the first trimester. The first trimester is the first three months of pregnancy and the embryonic period ends around week 8 and it then becomes a fetus.
Initial stage Intermediate stage Late period Delayed period
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