# Plesiosaurs Gave Birth to Live Young

**URL:** <https://boards.straightdope.com/t/plesiosaurs-gave-birth-to-live-young/592361>\
**Category:** Miscellaneous and Personal Stuff I Must Share\
**Created:** [August 11, 2011, 6:17pm UTC](https://boards.straightdope.com/t/plesiosaurs-gave-birth-to-live-young/592361 "2011-08-11T18:17:02Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![bup](https://avatars.discourse-cdn.com/v4/letter/b/6bbea6/32.png) [@bup](https://boards.straightdope.com/u/bup)\
**Post date:** [August 11, 2011, 6:17pm UTC](https://boards.straightdope.com/t/plesiosaurs-gave-birth-to-live-young/592361/1 "2011-08-11T18:17:02Z")

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…at least some of them did -[they found a fossilized mother with a pretty fully-developed embryo inside her.](http://www.sciencemag.org/content/333/6044/870.abstract)

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**Author:** ![dropzone](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/dropzone/32/7515_2.png) [@dropzone](https://boards.straightdope.com/u/dropzone)\
**Post date:** [August 11, 2011, 6:29pm UTC](https://boards.straightdope.com/t/plesiosaurs-gave-birth-to-live-young/592361/2 "2011-08-11T18:29:32Z")

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“The combination of viviparity, large offspring size, and small brood number differs markedly from the pattern seen in other marine reptiles…”

What about ichthyosaurs? [Mijndomein](http://www.lucasbrouwers.nl/blog/wp-content/uploads/2009/10/ichthyosaur-giving-birth-1024x328.jpg)

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**Author:** ![bup](https://avatars.discourse-cdn.com/v4/letter/b/6bbea6/32.png) [@bup](https://boards.straightdope.com/u/bup)\
**Post date:** [August 11, 2011, 6:53pm UTC](https://boards.straightdope.com/t/plesiosaurs-gave-birth-to-live-young/592361/3 "2011-08-11T18:53:27Z")

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What about [The Water Horse](http://www.imdb.com/title/tt0760329/)?

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**Author:** ![Triskadecamus](https://avatars.discourse-cdn.com/v4/letter/t/b19c9b/32.png) [@Triskadecamus](https://boards.straightdope.com/u/Triskadecamus)\
**Post date:** [August 12, 2011, 3:22am UTC](https://boards.straightdope.com/t/plesiosaurs-gave-birth-to-live-young/592361/4 "2011-08-12T03:22:16Z")

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Oh, wow.

I thought you meant recently!

Tris