A recent study examined how twins grow in the second half of pregnancy. Have a look at twin fetal weight charts week by week.
Find out how much weight to gain if you're pregnant with twins. Have a look at the twin pregnancy weight gain chart from The National Academy of Medicine.
Read about your pregnancy from week 3+0 to 3+6. You're now 4 weeks pregnant with twins.
Learn about each week of your twin pregnancy and read stories from other mothers of twins. Find out how twins are formed and when you might expect to deliver.