Zain Rajani was born 22 days ago in Toronto, Canada. To say he was much anticipated would be an understatement—his parents, Natasha and Omar Rajani, had been trying for four years to get pregnant. Finally, they turned to in vitro fertilization, but Natasha's eggs were a bit old. So her doctors tried a new mitochondrial replacement technique similar to the one hotly debated in the U.S. and the United Kingdom, according to an article from Time. Those debates are centered around "three parent babies" and, though the same technique was used in this case, Zain only has two parents.

Part of the reason Natasha, now 34, wasn't getting pregnant was that her eggs weren't of very high quality, which happens more frequently with age. But researchers figured out that they could remove the mitochondria from stem cells that develop into eggs, found in her own ovarian tissue. Then the stem cell mitochondria could replace the mitochondria in the old egg which, when fertilized, behaves like a younger egg and makes IVF treatments more successful.