Women under 35 years of age with IVF can have 1 or 2 embryos placed if it is their 1st transfer. In the case of IVF women over the age of 35, or for the 2nd or more transfer 2 to 3 embryos can be placed. The number of embryos to be transferred is specified, taking into account age, number of transfers, quality of embryos, etc. Women under 35 years of age can have 1 or 2 embryos placed in the first transfer. In the case of IVF women over the age of 35, or for the 2nd or more transfers 2 to 3 embryos can be placed. However, with the steady increase in IVF transfer success rates, and in order to reduce multiple births, ovarian hyperstimulation, and obstetrical risks, most fertility centers are opting for single embryo transfers for younger patients or those who have good quality blastocysts.