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  2. Estrous cycle - Wikipedia

    en.wikipedia.org/wiki/Estrous_cycle

    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. Proestrus bleeding in dogs is common and is believed to be caused by diapedesis of red blood cells from the blood vessels due to the increase of the estradiol-17β hormone. [20]

  3. List of mammalian gestation durations - Wikipedia

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

    Large mammals develop at an absolute slower rate compared to small mammals. Thus, the large mammal tend have longer gestation periods than small mammal as they tend to produce larger neonate. [18] Large mammals require a longer period of time to attain any proportion of adult mass compared to small mammals. [19]

  4. Pregnancy (mammals) - Wikipedia

    en.wikipedia.org/wiki/Pregnancy_(mammals)

    The duration of this period varies between species. For most species, the amount a fetus grows before birth determines the length of the gestation period. Smaller species normally have a shorter gestation period than larger animals. [2] For example, a cat's gestation normally takes 58–65 days while an elephant's takes nearly 2 years (21 ...

  5. Canine reproduction - Wikipedia

    en.wikipedia.org/wiki/Canine_reproduction

    During both of these periods, progesterone levels are high. Because the hormonal profile of a pregnant female and a female in diestrus are the same, sometimes a non-pregnant female will go through a period of pseudopregnancy. At that time she may gain weight, have mammary gland development, produce milk, and exhibit nesting behaviours. 4.

  6. Gestation - Wikipedia

    en.wikipedia.org/wiki/Gestation

    Gestation is the period of development during the carrying of an embryo, and later fetus, inside viviparous animals (the embryo develops within the parent). [1] It is typical for mammals, but also occurs for some non-mammals. Mammals during pregnancy can have one or more gestations at the same time, for example in a multiple birth. [2]

  7. Why do doctors always ask about your last menstrual period ...

    www.aol.com/lifestyle/why-doctors-always-ask...

    Knowing the first day of a woman’s last menstrual period is useful in other ways. Dr. Arlene Go, an ob-gyn and ... Nayot adds that “aggregated data” over time gives doctors even more ...

  8. Menstruation (mammal) - Wikipedia

    en.wikipedia.org/wiki/Menstruation_(mammal)

    Menstruation is the shedding of the uterine lining (endometrium). It occurs on a regular basis in uninseminated [ 1 ] sexually reproductive-age females of certain mammal species. Although there is some disagreement in definitions between sources, menstruation is generally considered to be limited to primates .

  9. Induced ovulation (animals) - Wikipedia

    en.wikipedia.org/wiki/Induced_ovulation_(animals)

    Cats are another widely-known induced ovulator. After mating, the LH levels in female cats surge, and the time to ovulation can be predicted to occur between 1–2 days later. [13] Wolverines are other known induced ovulators which require physical mating to cause ovulation. [14]