A dog pregnancy period is an exciting time and if you waiting for your female dog to deliver pups then, fortunately, you will not have to wait as long as humans do. Female dogs have a short gestation period of 63 days. The whole pregnancy period of a female dog starts when she is on heat. Generally, every female dog breaks into heat every 6 months but this might differ for some breeds. The heat cycle or productive cycle of a female dog last 18-21 days. 

Four stages of dog pregnancy period/cycle are:

  1. Proestrus: This is the first stage of the cycle which lasts 7-11 days. During this period female secretes and attracts males for mating but does not allow mating if the male dog tries to mate. Signs of the Proestrus stage are: Swollen vulva and bloody discharge.
  2. Estrus: This is the second stage of the cycle which lasts 3-4 days. During this period female allows male dogs to mate. The signs of estrus are soft and large vulva & lightening of discharge color.
  3. Diestrus: This is the third phase of the cycle which lasts for 14 days and during this period the female dog goes off the heat and will now allow male dogs to mate. Signs of diestrus are the normal-sized vulva and discharge taper off.
  4. Anestrus: This is the fourth phase of the cycle is the time period one period of heat to another period of heat and is generally of 6 months. 

Female dogs give birth to their offspring in 63 days from the day of conceiving. It is difficult to calculate the day of conceiving by the day of mating since the sperm can remain active inside in the female for several days.

Newborn puppies are susceptible to several infections and is important to get their first vaccinations by veterinary at the time as per the vaccination schedule.