fetal anatomic position

https://doi.org/10.1351/goldbook.10381

Usual positioning of the developing fetus with the back curved forward, head bent forward, and limbs drawn in towards the body.

Note: This position arises from the natural positioning of the embryo as the germ layers develop.
Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 722 [Terms] [Paper]