
A female
dog must be in heat and receptive to conceive. Just because they were
together doesn't insure a successful mating. When dogs breed, they
form a tie, being stuck together in coitus for fifteen to thirty
minutes. The gestation period is 62 days. During the first half of
pregnancy, she will not change in appearance. A progesterone analysis
test can indicate if a successful ovulation has occurred in early
pregnancy. After the first month, you may be able to detect an
abdominal enlargement, mammary gland enlargement, and changes to her
pelvis. In late term pregnancy, the mammary glands are obviously full,
and she may show nesting behaviors. After the first month, your
veterinarian can perform ultrasound or perform a blood test to
determine pregnancy.