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Most animals have only certain times when they can get pregnant, known as estrus or heat. Humans can always become pregnant, which means the uterus is always preparing for pregnancy. When a human female doesn't become pregnant, a period results.
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∙ 12y ago
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What animals have periods?
Humans and chimpanzees are the only animals that have "periods" or menstrual cycles. Other animals of the animal kingdom undergo Estrus, or heat periods (spikes in Estrogen output) during their Estrous cycle.
During the periods humans altered their habitats?
humans always do
You had two periods in a month which one did you get pregnant with?
Humans don't get pregnant when they have a period. That's only for animals. Human females mostly get pregnant mid-way between their periods.
Do humans hunt the megamouth shark?
well they would but megamouth sharks live at deep deths and will only come to the surface for certain periods of time.
What are the names of homes in Antarctica that humans live in?
Antarctica is home only to scientists, and for short periods of time. These scientists live in the "bases" developed by their countries.
Do dogs and cats get menstrual periods?
never there not the same as humans!
Do American girls have periods?
No, their dolls not humans, Numb nuts.
Do fish have periods?
No - only mammals have periods.
During what period did humans alter their habitat?
humans always do
Did dinosaurs eat people?
No, Humans and Dinosaurs are in different time periods.
Do budgies have periods?
No. Periods are seen only in placental mammals. Birds do not have them.
Are female sheep and female humans sexual organs alike?
yes. They have periods like we do.
