The best and most permanent treatment for nipple deformities is nipple correction surgery.

Inverted Nipple Surgery: Procedures, Recovery & Side Effect

An inverted nipple is harmless, but it may interfere with your breastfeeding, lower your self-confidence, and impact your sexual activity. Based on the grade of nipple inversion, the doctor suggests using Hoffman's technique, suction devices, nipple piercings, or getting cosmetic surgery. Although nipple surgery fully restores the nipples, it might harm all or some of the milk ducts.
Does IVF increase chance of twins

Twins in IVF: Chances and Complications of Twin Pregnancy

Twin pregnancy is common in IVF treatment, as usually, more than one embryo is transferred into the mother's womb. Even if one embryo is put in the uterus, the chance of developing an identical twin is higher in IVF than in natural pregnancy. Although multiple births are exciting for couples longing for a baby, it may have adverse effects on the mother's health and put her life at risk.