Contraception in Genesis?

What is “Onanism”? Cale looks at Genesis 38 where we see the sordid tale of Judah and Tamar. Why is contraception wrong?

A Test of Life and Death for Your Marriage: https://relevantradio.com/2020/10/a-test-of-life-and-death-for-your-marriage/

The Medical Problems of Contraception: https://relevantradio.com/2020/10/the-medical-problems-of-contraception/