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  2. A Comprehensive Guide to Navigating Your Dog’s Pregnancy - AOL

    www.aol.com/comprehensive-guide-navigating-dog...

    Dog pregnancies are typically divided into three stages: 1-3 Weeks: Small changes take place with a female dog’s body and behavior. It’s often hard to tell that they are pregnant this early ...

  3. Canine reproduction - Wikipedia

    en.wikipedia.org/wiki/Canine_reproduction

    Canine sperm can live for 10 to 11 days [22] in the oviducts (fallopian tubes) so if a female is bred 10 days before the oocytes (eggs) can be fertilized, she will appear to have a gestation length of 70 days. If she is bred on the day the oocytes can be fertilized, her gestation length will appear to be 60 days long.

  4. List of mammalian gestation durations - Wikipedia

    en.wikipedia.org/wiki/List_of_mammalian...

    A marsupial has a short gestation period, typically shorter than placental. For more information on how these estimates were ascertained, see Wikipedia's articles on gestational age. The gestation figures given here are shown in days. They represent average values and should only be considered as approximations.

  5. Dog breeding - Wikipedia

    en.wikipedia.org/wiki/Dog_breeding

    Gestation in a dog is 63 days in length, if measured from the day of ovulation. Since it is difficult to determine the exact date of ovulation, errors are often made in calculating gestation period. Canine sperm can live for 10 to 11 days in the fallopian tubes so if a female is bred 10 days before the oocytes (ovum) can be fertilized, she will ...

  6. Estrous cycle - Wikipedia

    en.wikipedia.org/wiki/Estrous_cycle

    Female dogs bleed during estrus, which usually lasts from 7–13 days, depending on the size and maturity of the dog. Ovulation occurs 24–48 hours after the luteinizing hormone peak, which occurs around the fourth day of estrus; therefore, this is the best time to begin breeding.

  7. Dogs don't actually age 7 times faster than humans, new study ...

    www.aol.com/lifestyle/dogs-dont-actually-age-7...

    The actual formula for calculating a dog's age, it turns out, might mean breaking out your graphing calculator. Dogs don't actually age 7 times faster than humans, new study shows Skip to main content

  8. Pregnancy - Wikipedia

    en.wikipedia.org/wiki/Pregnancy

    A pregnancy is considered term at 37 weeks of gestation. It is preterm if less than 37 weeks and post-term at or beyond 42 weeks of gestation. The American College of Obstetricians and Gynecologists have recommended further division with early term 37 weeks up to 39 weeks, full term 39 weeks up to 41 weeks, and late term 41 weeks up to 42 weeks ...

  9. Gestational age - Wikipedia

    en.wikipedia.org/wiki/Gestational_age

    For example, if there is a gestational age based on the beginning of the last menstrual period of 9.0 weeks, and a first-trimester obstetric ultrasonography gives an estimated gestational age of 10.0 weeks (with a 2 SD variability of ±8% of the estimate, thereby giving a variability of ±0.8 weeks), the difference of 1.0 weeks between the ...

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