The average weight of twins is 2.5kg.
While the average single baby weighs 7 pounds at birth, the average twin weighs 5.5 pounds. Triplets typically weigh 4 pounds each, and quads weigh 3 pounds each.
In fact, 38 weeks is considered “full term” for twins, rather than 40 weeks like a singleton baby. Because of these early births (most twin pregnancies deliver around 36 weeks), the babies are typically smaller too, with the average twin weighing around 5.5 pounds.
You are now 33 weeks pregnant, which is the beginning of week 34. Your baby weighs about 2.1kg (2,100 grams or 4 lbs 10 oz) and measures about 45 cm in length (17.75 inches).
This week, your baby grows as long as 20 inches and weighs around 2 kg.
The heaviest birth weight for surviving twins on record goes to Mrs. J.P. Haskin of Arkansas, on February 20 1924, whose twins weighed in at an eye-watering 14lbs & 13lbs 12oz, totalling 27lb 12oz.
The worlds heaviest twins, with an aggregate weight of 12.58 kg (27 lb 12 oz), were born to Mary Ann Haskin (USA), of Fort Smith, Arkansas, USA on 20 February 1924.
And, babies born at this stage are not any more likely to have long-term health issues than their full term peers. Your babies weigh just shy of 5 lbs — though there is some variation in size at this stage!
18.5-24.9 kg/m2
throughout pregnancy. You should aim to be between the two lines during your pregnancy.
A little more than half of twin pregnancies end in preterm delivery (before 37 weeks). While 40 weeks is the full gestation period of the average pregnancy, most twin pregnancies are delivered at approximately 36 weeks (range 32-38 weeks depending on the type of twin pregnancy).
Your twins' organs are fully developed and in place, although their lungs are still maturing. If you go into labour prematurely, you may be offered steroids to help your babies breathe after the birth.
Twin pregnancies are at high risk of stillbirths compared to mothers carrying just one baby. This risk increases 13-fold if twins share the placenta, and five-fold when they have their own placenta. Stillbirth risk also increases as the pregnancy advances so mothers are often delivered before their due date.
In fact, they're already starting to look very much like newborns! But your twins still have plenty of growing to do. They're likely to gain at least 600g (1.5lb) before they're born (Moore et al 2019). You may find that your babies' movements feel a bit different this month .
If you have difficulty deciphering who's doing the kicking, ask your healthcare provider if there's any way you can make that determination. Your babies weigh around 4.5 pounds each now — about the size of a cauliflower blossom!
The lower birth weight for second-born twins could be due to the fact that first-born twins have higher placental weights and have more often a central insertion of the umbilical cord, which are both positively correlated with birth weight.
No. 7: If you're pregnant with twins, you may gain more weight than if you're carrying one child. "With twins, mothers gain more weight as there are two babies, two placentas, and more amniotic fluid," says Al-Khan. "You also need more calories for twin pregnancies."
There's one guarantee with pregnancy - you'll have a bump that will grow every week. And if you're carrying twins (or more) that bump is going to expand a lot quicker and you're likely to get a lot bigger.
Total weight gain of 16 to 20.5 kg (35 to 45 lb) is consistent with a favorable outcome of a full-term twin pregnancy. This suggests that a woman who is pregnant with twins should aim for a weekly weight gain of approximately 0.75 kg (1.5 lb) during the second and third trimesters of pregnancy.
Your expanding bump may also cause you to outgrow clothes quickly because of extra weight gain. It's common to put on around 50 lbs. during a twin pregnancy, compared to 30 lbs. for a singleton baby.
The average gestational age for twins at birth is 36 weeks. Their lungs are well developed by 34 weeks, and all body systems are now functioning.
The Average Birthweight of Twins
Low birth weight is defined as less than 2,500 grams or 5 pounds, 8 ounces. Very low birth weight is defined as weighing less than 1,500 grams or 3 pounds, 5 ounces.
Body Weight
However, your baby is considered healthy if they are between 2.5kg to 3.8kg.
Jack and Isla O'Kane could be the biggest naturally born twins in the country weighing in at 4.245kg and 3.2kg respectively.
Studies also show that twins are more likely to suffer from specific health disorders. While they represent just 2 percent of the general population, twins make up 7.4 percent of the nation's cerebral palsy sufferers.
The risk of preterm labor and premature birth are heightened when there is more than one baby in the womb. 1 Other conditions such as preeclampsia, placental dysfunction, and twin-to-twin transfusion syndrome are more prevalent in twin pregnancy and increase the risk of an early delivery.