Week 11

Key Events of Human Development during the eleventh week (week 11) following fertilization or Clinical week ((GA}} 13 (LMP).

Day	Stage	Event
71		Thyroid - colloid appearance in thyroid follicles, iodine and thyroid hormone (TH) synthesis Gastrointestinal Tract - Stomach - Serotonin containing cells in both the antrum and the fundus. Integumentary - blood vessels visible in the early fetal skin, small blood vessels in the upper papillary region and larger vessels in the deep reticular dermis.
72
73
74
75
76
77		Week 11 - CRL 68 mm, femur length 12 mm, biparietal diameter 20 mm

Glossary Links

Glossary: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Numbers | Symbols | Term Link

---

Cite this page: Hill, M.A. (2026, September 22) Embryology Week 11. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Week_11

What Links Here?

© Dr Mark Hill 2026, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G