At approximately day 1

Kidneys ascend from pelvis to abdomen, rotating medially almost 90 degrees by week 9.

Duration: 2 weeks

Reference

Moore KL, Persaud TVN. 1998. The Developing Human: Clinically Oriented Embryology. 6th ed. Philadelphia: WB Saunders Co.

At approximately day 1

Cloacal membrane ruptures creating the anal opening for the hindgut.

Duration: 1 week

Reference

Sadler TW. 2004. Langman’s Medical Embryology. Ninth Edition. Maryland: Lippincott Williams & Wilkins.

At approximately day 1

The greater curvature of the stomach forms the fundus and cardiac incisure.

Reference

Larsen WJ. 1997. Human Embryology. New York: Churchill Livingstone Inc.

At approximately day 1

The stomach rotates 90 degrees and tilts.

Duration: 1 week

Reference

Larsen WJ. 1997. Human Embryology. New York: Churchill Livingstone Inc.