Did You Know {207} ~ Female Kangaroos Have Three Vaginas & Two Uteruses & Practice Birth Control

The female kangaroo has three vaginas and two uteruses. The two outermost vaginas are used for sperm transportation to its two uteruses. Babies are born through the middle vagina. By contrast, female placental mammals have only one uterus and one vagina.

With this unusual reproductive system, a female kangaroo can be continuously pregnant, with a fertilised egg in one uterus waiting to be released, a baby growing in the other uterus, one in her pouch and another hopping outside but coming to its mother for milk. In this way, a female kangaroo can take care of multiple joeys at different stages of development. Another unique feature of these animals is that the female kangaroo can practice birth control during drought and starvation by putting the babies growing in her uteruses ‘on hold’, stopping their future development until conditions improve. This is called embryonic diapause. Then, when the mother’s pouch becomes free, the next baby will be born and move into the pouch, and the fertilised egg “on hold” in a uterus will start developing into a new foetus. Because of this multiple-offspring strategy and other adaptabilities unique to the kangaroo, populations can increase rapidly when food is plentiful.

2 thoughts on “Did You Know {207} ~ Female Kangaroos Have Three Vaginas & Two Uteruses & Practice Birth Control”

  1. I am always stunned when I learn this type of information. What a wonderful place we are visiting! The earth has so many fascinating creatures, how constantly amazing. Take care my friend.

    Liked by 2 people

    1. Absolutely Bryan, I was amazed and in awe of nature’s intelligence whilst researching this. Imagine how much we do not know!! There are things we know we know, things we know we don’t know and things we don’t know we don’t know! Blessed. Wonders of the cosmos. 🙏🏻♥️

      Liked by 2 people

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