When i had my twins they were 9 weeks early.
They spent that entire time in hospital.
They had their first needles in hospital.
The girls were slower with their development & they were alot smaller than others the same age but I never pushed anything on them.
They finally walked when they were 16 months.
Your babies will get there, be happy that you have two precious healthy babies.
By the way my twins are now 13 & 1 is still a little bit slower than the other, but thats ok bcos even thou they look the same they are two seperate people.
I look back at how fast time has flown by, so please enjoy your babies while they still are.