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All Images Video Template 3D. Ovulation is the release of the egg from the follicle. The hormones maintain the pregnancy and prepare the mothers body for birth and lactation. Oestrogen also stimulates the endometrium to thicken again. They can also cause pain, miscarriage, or infertility. This procedure is particularly useful for assessing acrosomal integrity.

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The penis is removed from the vagina before ejaculation.

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On the global market, Denmark has a well-developed system of human sperm export. Services How to buy Sell images Corporate services. The fusion of sperm and egg cell is called fertilisation. Internal structure of the axoneme. In severe cases where there are many large fibroids the uterus may have to be removed. The polygon shape in the form of insemination on a dark background. Thus, the diploid genome directs sperm differentiation just as it directs egg differentiation.

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