Answer:

1.

What's the menstrual cycle? The menstrual cycle is the monthly series of changes a woman's body goes through in preparation for the possibility of pregnancy. Each month, one of the ovaries releases an egg — a process called ovulation. At the same time, hormonal changes prepare the uterus for pregnancy.

2.

Menstrual flow might occur every 21 to 35 days and last two to seven days. For the first few years after menstruation begins, long cycles are common.

3.

Pain is the most common problem women have with their periods. More than half of women who have periods get some pain around their period. Some women may get just a feeling of heaviness in the abdomen or tugging in the pelvic area. Other women experience severe cramps different from premenstrual syndrome (PMS) pain

1.

Asexual reproduction in animals occurs through fission, budding, fragmentation, and parthenogenesis. ... Sexual reproduction starts with the combination of a sperm and an egg in a process called fertilization. This can occur either outside the bodies or inside the female. The method of fertilization varies among animals.

2.

Some animals produce offspring through asexual reproduction while other animals produce offspring through sexual reproduction. Both methods have advantages and disadvantages. Asexual reproduction produces offspring that are genetically identical to the parent because the offspring are all clones of the original parent.

3.

Reproduction may be asexual when one individual produces genetically identical offspring, or sexual when the genetic material from two individuals is combined to produce genetically diverse offspring. Asexual reproduction in animals occurs through fission, budding, fragmentation, and parthenogenesis.

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