Why unfaithful woman thigh rots and belly swells in Numbers 5! Proof from bible!

The law of jealousies in Numbers chapter 5 foretells the birth of Jesus Christ! The faithful woman conceives seed and is made free to paraphrase of course. The unfaithful woman is under curse and belly swells and thigh rots to paraphrase of course.
Why specifically thigh rot and belly swell!

Believe in Jesus Christ and you shall have everlasting life! Get a king james bible and believe.
Read Matthew.
Pray for help and guidance and understanding.
Some chapters used,
Genesis chapter 24,32.
Jeremiah chapter 5.
1 Corinthians chapter 6.
Romans chapter 16.
Numbers 5.