A typical pregnancy lasts 40 weeks from the first day of your last menstrual period (LMP) to the birth of the baby. It is divided into three stages, called trimesters: first trimester, second trimester, and third trimester. The fetus undergoes many changes throughout maturation. How Soon Can You Tell If You Are Pregnant?
Stages of Canine Pregnancy Week By Week. Weeks One and Two. An average pregnancy lasts for anything from 56 to 70 days depending on the breed, so this is still early days. Once out of heat, you can continue as usual with your dog – you can groom, feed and walk them exactly as you would if they were not pregnant.
Conception to about the 12th week of pregnancy marks the first trimester. The second trimester is weeks 13 to 27, and the third trimester starts about 28 weeks and lasts until birth.