In this image taken during a late embryonic stage of a mouse heart, the developing coronary arteries have been stained turquoise using antibodies. The tissue was made transparent using tissue clearing ...
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When does the heart develop in a fetus?
When does your baby develop a heartbeat? A baby's heartbeat (at this point a fluttering of cells) starts as early as to 4 weeks after conception or 6 weeks after the first day of the last menstrual ...
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