Birdwatch Note Rating
2023-04-14 13:39:42 UTC - HELPFUL
Rated by Participant: 61B0A3DB843C006E9D9FC34E9E23E1151EF0DBD5C22CAE73745A69938D6B34AD
Participant Details
Original Note:
The embryonic heart begins beating by 22 days post-fertilization & actively pumps blood by the end of gestational week 4. https://www.karger.com/Article/Fulltext/501906 Video of beating heart at 4 weeks 4 days post-fertilization (6 weeks 4 days since last menstrual period). https://www.ehd.org/movies/21/The-Heart-in-Action
All Note Details