thank you everyone for your honesty I do really appreciate it thanks again.

I was asked to remove my uterus when i was 21 and told that giving birth could end my life. I have tho with supervision had 2 more kids wince then. Pregnancy is horrendous for me and that why was considering if there was an option to have two int he one pregnancy and be done.
given this bit of info, i think it would be a VERY BAD IDEA to try for a twins pregnancy at all!! you obviously have at least two children you love - do you really think it's worth putting your life on the line - potentially take their mother away from them - on the whim of wanting two children at once??? this may sound harsh - and maybe it needs to be - you have to be realistic here. you have children that need their mother - would you want to go through a twins pregnancy and leave your DH and FOUR + CHILDREN motherless?? i understand the desire to have a large family, i understand that it might seem like the easy way to get a large family more quickly - but please, think this through logically