From Dog

Pregnancy in dogs usually last from 55 - 65 days (average 63 days; 9 weeks).

Diagnosis can be achieved by manual palpation (experience required), use of ultrasonography or testing blood levels of progesterone[2].

Although injectable estrogen can prevent pregnancy, their use increases risks of developing pyometra or bone marrow suppression.

Unwanted pregnancies can be terminated via ovariohysterectomy, or use of drugs such as dexamethasone, misoprostol.

Pregnancy prevention requires use of physical isolation of dogs in estrus, or use of proligestone[3], megestrol acetate or deslorelin for estrus suppression.

Diseases associated with pregnancy include:

Most dogs kept as pets are routinely neutered to prevent unwanted puppies and antisocial behaviour such as aggression.


  1. Dogs Pregnancy
  2. Beccaglia M & Luvoni GC (2012) Prediction of parturition in dogs and cats: accuracy at different gestational ages. Reprod Domest Anim 47(6):194-196
  3. Balogh O et al (2012) Leptin and leptin receptor gene expression in the canine corpus luteum during diestrus, pregnancy and after aglepristone-induced luteolysis. Reprod Domest Anim 47(6):40-42
  4. England GC et al (2012) Delayed uterine fluid clearance and reduced uterine perfusion in bitches with endometrial hyperplasia and clinical management with postmating antibiotic. Theriogenology 78(7):1611-1617
  5. Coate KC et al (2013) Hepatic glucose metabolism in late pregnancy: normal versus high-fat and -fructose diet. Diabetes 62(3):753-761