1: κοιλία
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(Strong's #2836 — Noun Feminine — koilia — koy-lee'-ah )

denotes "the womb," Matthew 19:12; Luke 1:15,41,42,44; 2:21; 11:27; 23:29; John 3:4; Acts 3:2; 14:8; Galatians 1:15 . See BELLY , No. 1.

2: γαστήρ
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(Strong's #1064 — Noun Feminine — gaster — gas-tare' )

is rendered "womb" in Luke 1:31 . See BELLY , No. 2.

3: μήτρα
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(Strong's #3388 — Noun Feminine — metra — may'-trah )

the matrix (akin to meter, "a mother"), occurs in Luke 2:23; Romans 4:19 .