At 13 weeks pregnant, you might notice that you’re starting to eat more calories than usual. Your baby has already grown a lot, but it’s nowhere near its full size, and you’ll need to keep providing it with energy and food to help it get bigger.
How big is the Baby?
At this point, your baby will be just under three inches in size, and weigh less than one ounce (usually around 0.8 ounces). That’s small enough to fit in your palm, but not large or heavy enough to make any real difference to your body shape just yet.
How Has The Baby Developed?
Thirteen weeks means that you’re just about to start the second trimester, meaning that your baby is starting to develop in more complex ways. A lot of these changes are internal, so you won’t notice them even if you take a normal ultrasound, but you can still usually get a doctor to check if you’re worried that something’s growing incorrectly.
First of all, your baby will grow fingerprints. It won’t be much right now, since their fingers are still small and their body is still growing, but the prints will still be unique to them. There’s nothing else to really say about them, so there’s no need to keep track of their development.
What you should focus on is the development of the kidneys, which is an extremely vital part of a baby’s body and something that’s extremely hard to live without. Now that they have working kidneys (even though they haven’t grown to full size yet), your baby will start to urinate every so often. This is completely harmless, but it, unfortunately, means that they’ll probably end up swallowing some of it – don’t worry, this doesn’t cause any problems.
There’s also the vocal cords, which will still be in a very basic state at this point. They’re weak and barely fully-formed, but they’ll keep growing as you get through the pregnancy in preparation for the birth (and the first time it cries).
How Will My Body Change?
You’ll likely notice a very slight belly bulge at this point – not enough to really stand out, especially if you already had some body fat in that area, but it’s there. On top of that, your body will go through a few more changes and suffer some extra side effects, which can differ from those you had in the first trimester.
- Some women will experience an increased appetite due to the baby taking some of their nutrients, to the point where they can end up eating far more than they used to. There’s no real way to avoid this, since it’s healthy to make sure you’re eating enough: just avoid foods with empty calories or low nutrition, since you might end up putting on a lot of weight in the process.
- Heartburn is quite likely, and not always due to the food you’ve been eating. However, keeping track of your diet can make a difference – if you have something spicy or rich that seems to directly cause your heartburn, try to cut it out of your diet for a while. If that doesn’t help, try to have a larger amount of smaller meals per day, instead of relying on the big three.
- In some cases, your sex drive might increase. As you might expect, this is mostly hormone-related, but it isn’t an illusion: your body is actually properly prepared for it, and it’s usually safe to have sex while pregnant (although you should still check with your doctor first, of course). Don’t be afraid to take advantage of it if you feel like it!
- As with earlier stages of the pregnancy, nausea is still very likely. However, at this point, you’re not likely to develop it out of nowhere – you’ll generally only have it if it’s stuck around from the first trimester, and it’ll start to tail off later on in the pregnancy. If it doesn’t, and you still feel nauseous within a few weeks, it’s a good idea to check with your doctor just in case.
- Unfortunately, stretch marks are a common sight. Your skin will be stretching in certain areas, namely your breasts and hips, and you’ll be able to see the red-tinted streaks on your body. Various lotions and treatments can deal with them, but it’s sometimes a genetic issue that won’t go away until your pregnancy is over.
- Baby movements might have become obvious now. If not, then you’ll probably be able to tell within the next few weeks. It’s not always easy to tell if a sudden bump is actually the baby kicking, but this is around the time it’ll start to happen with any real frequency.
If you’ve confirmed that you’re having twins, you’ll also need to start taking vitamins or similar medicines if you haven’t already. It’s not easy to provide nourishment to two babies on top of yourself, so don’t just rely on your appetite to get you through the day.
What will life be like?
The second trimester will take a lot out of you, so be prepared to relax and take better care of your body. You won’t have a big pregnant belly yet, but you’ll still feel drained and hungry, which can force you to make some changes to your day-to-day routines and lifestyle for a while.
First of all, make sure you’re eating enough. You don’t need to keep track of your calories unless you’re trying to be hyper-careful, but it’s important to make sure you’re getting enough nutrition. For example, fruit and vegetables should be your snack of choice, alongside things like nuts, natural foods or anything filled with protein. Calories on their own are also important, but you can’t just rely on sweet snacks to keep you full.
Your belly will almost always suffer from stretch marks and sensitive areas, so be prepared to treat them properly whenever you can. Even if it doesn’t make much of a visible difference, it’s still a good idea to keep your tummy moisturized, and it can help you relax during this stressful part of your pregnancy. It might also help prevent worse stretch marks as the baby continues to grow, since you’ve still got quite a long way to go before the birth can even start.
Remember to start planning in future events around your pregnancy, too. The second trimester doesn’t leave you with a large belly, but it can be physically draining, so make sure you schedule in times to relax or take things easy for a while. Nothing is more important than the health and safety of you and your baby, so focus on yourself and don’t pressure yourself too much.