<prompt> Most common twins after assisted reproduction:MonozygoticAcardiac twinDizygotic twinConjoined twin  <response>: Most common twins after assisted reproduction are dizygotic twins. For increasing the success of IVF and the expenses involved, its a norm to transfer 2-3 embryos of day 3 or 1-2 embryos of Day 5. For women lesser than 35 years, the implantation rate is better and hence these are the ones who have more multiple pregnancies. 