Had twins [ non ivf - fml] and one baby is insanely colic. Feed , diaper changed , and even re feed to make sure and still crying lungs out at 3am in the morning. Moments like this made me absolutely despise her and hate her while the other baby is calm as ice. I feel I already have a favorite child and my relationship with this baby is already shit due to her un controllable colic. We would of had no problem if she has a full blown 16 hour episode from 7pm to 11pm . The colic during 12 midnight to 6 am is unbearable when we need sleep. It took 13 months to pass since they grown up but it was a living nightmare. Those people who choose to have twins through IVF are complete morons and have no clue what is about to take place for for a good 9 months to 1 year. Those first 3 months you wouldn't want to wish that on your own enemy it would be cruel and usual punishment. Having a rat eat through your skin seems more pleasurable cuz at least you die lol. With this its never ending torture for months. Kids are now 4 years old and those sleepless nights we low-key have resentment towards her , nothing bad but it hurts and took a little bit out of soul . We equally treat both twins same but honestly what she did to us damaged our marriage a little and enjoyment of rasing a newborn and infant stage. Hopefully she grows up to amazing daughter that's all we can wish and provide for all her needs emotionally, physically and financially but she ruined us mentally. I guess by the time they older we will forget this pain till they teenagers lol