I believe I have mentioned my lifelong struggles with my weight on this blog. Apart from infertility, being overweight is the only health problem I've had so far. (I've been very lucky in that regard.)
I do come by this problem honestly. First, genetics: nearly everyone in my mother's family is either overweight or obese. Second, habits: my default is to eat a "typical American diet," and since childhood I've preferred to devote more time to intellectual pursuits like reading than to physical activity. There have been brief periods when I've established a habit of daily exercise, but it's a continual struggle for me, definitely not something which comes naturally. (In contrast to my husband, who feels antsy and odd if he skips more than one day at the gym.)
As an adult, my weight has fluctuated between 150 and 230+ lbs, depending on the intensity (or lack) of my efforts to control it. Most of the time since college I've weighed somewhere in the neighborhood of 195-210; that seems to be a weight range my body likes for some reason.
Many is the time I've lamented my trouble losing weight. I have often cursed my genes--which I can't control and are therefore easier to blame than my behavior--for predisposing me to weight gain. Many is the time I've envied others who are able to maintain a healthy weight, some of them seemingly effortlessly.
So given that my difficulty maintaining a healthy weight has been the bane of my existence since I was an adolescent, I have found it more than a little ironic that I have had so much trouble gaining weight since I've been pregnant. The one time in my life when it would be OK--indeed, encouraged--for me to gain weight, and I haven't been able to do it.
I've been concerned that by not gaining enough weight, I'm not helping our babies have the best possible outcome. A popular and well-regarded book on multiple pregnancy recommends gaining 20 lbs by 20 weeks for optimal outcomes, and I've obviously fallen far short of that goal.
My OB has not been concerned about my lack of weight gain thus far, and I have discussed it with her at nearly every appointment. She just says that the babies will take what they need and that there is no cause for concern as long as they are growing.
At my anatomy scan at around 20 weeks, both babies' estimated weights were slightly ahead of what would be expected for my dates, and that was reassuring. However, their growth rates and weights haven't been checked since then. I have a growth scan this afternoon, and I hope that it shows that they are both growing appropriately.
Of all times for my body to suddenly decide not to gain weight!