מניעת הריון וה.ח.ג לבחורה עם בעיות גנטיות

My daughter has a deletion of certain segments of the 15th chromosome (they are not the segments connected with Prader Willi Syndrome, nor for neurofibromatosis). She has a 50% chance of passing this deletion on to her children. The geneticists at Hadassah Hospital feel that, although they don't know conclusively what this deletion causes, they feel that her low/normal IQ, bicuspid heart valve, webbed toes, cafe au lait spots, cleft of the soft palate are part of this mutation. She is now 21 and would like to start dating. Is birth control permitted for her? Is a process of invitro fertilization and re-implanting the "normal" fertilized eggs only (with the mutated ones not being saved) halachically okay?

What advice or suggestions do you have for us?

Thank you.