Pics of real naked female teen cells

When the sperm fertilizes, or meets, the egg, this fertilized egg is called the zygote. After approximately 8 weeks, the embryo is about the size of an adult's thumb, but almost all of its parts — the brain and nerves, the heart and blood, the stomach and intestines, and the muscles and skin — have formed. Between 75 and million sperm are in this small amount of semen, and they "swim" up from the vagina through the cervix and uterus to meet the egg in the fallopian tube. The male gamete, or spermand the female gamete, the egg or ovummeet in the female's reproductive system. This fringed area wraps around the ovary but doesn't completely attach to it.

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Located between the legs, the vulva covers the opening to the vagina and other reproductive organs located inside the body.

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Below are some examples of disorders that affect the female reproductive system. Toward the end of puberty, girls begin to release eggs as part of a monthly period called the menstrual cycle. Progesterone, another hormone released by the ovaries, keeps the endometrium thick with blood so that the blastocyst can attach to the uterus and absorb nutrients from it. As cells from the blastocyst take in nourishment, another stage of development, the embryonic stage, begins. The baby is pushed out of the uterus, through the cervix, and along the birth canal. In the human reproductive process, two kinds of sex cellsor gametes pronounced: They are different in shape and structure, but both are specifically designed to produce, nourish, and transport either the egg or sperm.

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