Health problems amongst offspring due to inbreeding when closely related relatives got married and produced offspring during Ancient Biblical times?

During Ancient Biblical times, it was common for 1st cousins to get married. > Genesis 24:15 > > New American Standard Bible 1995 > > Rebekah Is Chosen > > 15 Before he had finished speaking, behold, Rebekah who was born to > Bethuel the son of Milcah, the wife of Abraham’s brother Nahor, came > out with her jar on her shoulder. > Genesis 24:67 > > New American Standard Bible 1995 > > 67 Then Isaac brought her into his mother Sarah’s tent, and he took > Rebekah, and she became his wife, and he loved her; thus Isaac was > comforted after his mother’s death. > Genesis 28:2 > > New American Standard Bible 1995 > > So Isaac called Jacob > and blessed him and charged him, and said to him, “You shall not take > a wife from the daughters of Canaan. 2 Arise, go to Paddan-aram, to > the house of Bethuel your mother’s father; and from there take to > yourself **a wife from the daughters of Laban your mother’s brother.** > Genesis 29:21-30 > > New American Standard Bible 1995 > > Laban’s Treachery > > 21 Then Jacob said to Laban, “Give me my wife, for my [a]time is > completed, that I may go in to her.” 22 Laban gathered all the men of > the place and made a feast. 23 Now in the evening he took his daughter > Leah, and brought her to him; and Jacob went in to her. 24 Laban also > gave his maid Zilpah to his daughter Leah as a maid. **25 So it came > about in the morning that, behold, it was Leah! And he said to Laban, > “What is this you have done to me? Was it not for Rachel that I served > with you? Why then have you deceived me?” 26 But Laban said, “It is > not [b]the practice in our place to [c]marry off the younger before > the firstborn. 27 Complete the week of this one, and we will give you > the other also for the service which you shall serve with me for > another seven years.” 28 Jacob did so and completed her week, and he > gave him his daughter Rachel as his wife.** 29 Laban also gave his maid > Bilhah to his daughter Rachel as her maid. 30 So Jacob went in to > Rachel also, and indeed he loved Rachel more than Leah, and he served > with Laban for another seven years. However, if one reads about European Royal families then one will notice that there were inbreeding health problems amongst offspring because cousins married each other. ------------------------------------------------------------------------------------------ Excerpt from Credit Reference url: [Royal Inbreeding and the Hapsburg Jaw](https://www.utmb.edu/mdnews/podcast/episode/royal-inbreeding-and-the-hapsburg-jaw) > The Hapsburg dynasty ended with King Carlos the Second of Spain whose > tongue was so large he couldn't chew or talk well and drooled. He was > intellectually disabled and died just short of his thirty-ninth > birthday. > > To confirm that marriage with relatives closer than second cousins > caused the Hapsburg jaw, ten maxillofacial surgeons viewed sixty-six > portraits of fifteen members of the Hapsburg dynasty. They looked for > eleven features of the disorder and found them in at least seven > family members. Researchers also studied a family tree that included > six thousand people over twenty generations and established a link > between inbreeding and the disorder. Excerpt from Credit Reference url: [Royal Inbreeding and the Hapsburg Jaw](https://www.utmb.edu/mdnews/podcast/episode/royal-inbreeding-and-the-hapsburg-jaw) ------------------------------------------------------------------------------------------- Why weren't there any reports of health problems amongst offspring caused by inbreeding when closely related relatives got married to each other, and produced offspring during the Ancient Biblical days?