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Today's Date:
Choose Conception Date - Canine
Days since Conception:
Canine: Gestation range: 57-65 days, Average: 63 days.
Feline: Gestation range: 60-67 days, Average: 63-65 days
Likely Due Date
Early Due Date
Late Due Date
Pregnancy Info*
- Fertilization occurs in the oviducts in both the bitch and queen. Implantation of zygotes in the uterus occurs at ~18 days in the bitch and 14 days in the queen.
- Palpable at 21 days and these swellings double in diameter every 7 days. After day 35–38, they become indistinct, and palpation becomes difficult until late pregnancy
- the fetal skeleton begins to calcify as early as day 28, it is not detectable by routine radiography until approximately day 42–45 and is quite prominent by day 47–48. Radiography at this time is not teratogenic. Late gestational radiography, >55 days is the best method to determine litter size.
- Ultrasonography is best performed at 25–35 days gestation. Before 21 days, “false-negative” results are seen.
- Doppler-type instruments allow one to “hear” the fetal heart, which beats 2–3 times faster than that of the dam. Placental sounds may also be heard.
- Ultrasonography is especially helpful in differentiating pregnancy from other causes of uterine distention (eg, hydrometra, pyometra, mucometra).