Progesterone is a natural chemical produced by womenâs bodies. Its function at every level is tied to the reproductive system. Progesterone comes from the empty egg follicle in womenâs bodies after ovulation. This process is known as: corpus luteum.
Your little boy dog isn't born with his testes in his scrotum, but they should get there before too long. If they don't, he'll require surgery. The age at which his balls actually drop varies from dog to dog, but it should occur by the age of 2 months. When a male puppy is born, his testicles are near his inguinal ring. By the time he's a week to 10 days old, they should descend into the scrotal pouch. An animal's body is too hot for sperm production, so the testicles must descend outside to become fertile.
While in heat she will be able to breed with more than the one male. She will be in heat for 3 weeks and her cycle will arrive every 6-9 months. The first thing you will recognize when your dog goes into heat is a swollen vulva and bloody discharge. Eggs are not released yet in this phase of her heat cycle. Male dogs will be chemically drawn to her more than ever before. She still will not show a major interest in them, until this 6-11 day stage comes to an end. In the second stage of heat she is actually fertile.