I’ve had many different nightdresses throughout my pregnancy and breastfeeding days. But the ones with the most longevity have to be Mothercare’s Blooming Marvellous Maternity Nightshirts.
These are not the most flattering, but they’re 100% cotton so they’re cool and easy to wash. They have front poppers to allow you to feed (no fiddly clips to try and maneuver with one hand while holding on to a newborn). They are airy so they won’t rub against a healing c-section scar. And they cover you up (unlike strappy ones) , so you can get out of bed and lounge around the house knowing that should the doorbell ring unexpectedly or your father-in-law happen to traipse past you don’t have to struggle into your dressing gown with a wriggly baby screaming the place down.
I basically lived in these nightshirts for the first few weeks after BabyBoy and BabyGirl were born, and they’re still useful when we have houseguests and I don’t have time to get dressed before the morning feed. Best. Investment. Ever.