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When your pregnant dog is about to give birth, she will enter labor. For dogs, this occurs in three stages . First Stage: A pregnant dog’s uterus begins contracting and her cervix dilates.
In domestic dogs, sexual maturity occurs between the ages of 6 and 12 months for both males and females, although this can be delayed until up to two years of age for some large breeds. [2] Pregnancy is possible as soon as the first estrus cycle , but breeding is not recommended prior to the second cycle. [ 3 ]
During that fertile period, female dogs can get pregnant around twice a year with each “heat season” lasting three weeks. Furthermore, a pregnant dog’s gestation period lasts between 56-70 ...
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Timeline of human fertilization. In humans, pregnancy can be defined clinically, biochemically or biologically. Clinically, pregnancy starts from first day of the mother's last period. [4] Biochemically, pregnancy starts when a woman's human chorionic gonadotropin (hCG) levels rise above 25 mIU/mL. [5]
The average age of a girl's first period is 12 to 13 (12.5 years in the United States, [6] 12.72 in Canada, [7] 12.9 in the UK [8]) but, in postmenarchal girls, about 80% of the cycles are anovulatory in the first year after menarche, which declines to 50% in the third year, and to 10% by the sixth. [9]
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