Do apes, monkeys and other primates have estrogen cycles or menstrual cycles?

Question

Do apes, monkeys and other primates have estrogen cycles or menstrual cycles?

Answer 1

Chimpanzee:

http://encarta.msn.com/encyclopedia_7615...

"female has a 35-day menstrual cycle, is receptive to mating for 6.5 days out of each cycle, and can breed at any time of the year"

Answer 2

all mammels have a reproductive cycle - a designated time when they are prime for carrying on their species

Answer 3

In that humans are primates, yes primates have the menstral cycle.  

This includes apes, monkeys, etc.  it is generally a monthly visit in all primates.   The brain tells the ovaries when to do this.

Primates are exclusive in this type of menstruation