Can you enduce early birth with fish?

I wa watching a youtube video and saw a guy squeez thr babyfry out of the mom, can you do this before she is ready and will it kill her if she is already birthing, i will never do this unless a baby is stuck but im just wondering also i have a fry from the other mom that has a bent body, suprisi gly it lived and is almost 2 months old but the tail goes straight like a normal one and from the stomacj up to the head it goes slanted upwards northwest if you match it to a compas