At this point you're well into your second trimester and thankfully any fatigue or nausea you've had is gone.. Otherwise, just look at your growing belly to remember why you're going through all this trouble.
As your uterus continues to grow to accommodate your growing baby, your organs are changing to make room for frequent digestive issues or possibly heartburn..

Baby You

Your baby is now about 13 cm long and weighs about 100 to 140 grams.... Their skeleton, which is mostly made up of soft cartilage, is now turning into solid bone.... Your baby is even gaining some fat that helps regulate their body temperature.

Evolution of twins in week 17

Your doctor will monitor the growth of your twins during pregnancy.. Intrauterine growth restriction (IUGR) is a condition in which one or more babies grow below their gestational age.. They will monitor you closely with ultrasounds.. In some cases, treatment may include bed rest and even premature delivery.

Symptoms of pregnancy in week 17

At 17 weeks, some of the symptoms you may have in addition to nausea include:

Digestive problems

Digestive issues like heartburn, indigestion, and nausea are among the most common pregnancy discomforts....most pregnant women experience these symptoms at some point in their pregnancy.
Heartburn, a burning sensation that usually goes back to the throat, can be uncomfortable even if it's not generally dangerous....to prevent it, try eating small amounts of food at a time and see if small amounts each time help....discomfort for Your doctor can give you tips on which antacids are safe for your baby.

Gas and constipation are two other common digestive issues... Since these issues can get worse during pregnancy, it's best to make any dietary or lifestyle changes early to alleviate these discomforts before they get worse.... There's nothing you can do about the hormonal and physical changes that contribute to these feelings, but you can drink plenty of water, move more (even a short walk can help), and eat more fiber..

creating pigment in the skin

If brown or black spots appear on the face, you may be part of the 50 to 70 percent of pregnant women who experience melasma...also called the mask of pregnancy....Scientists theorize that hormonal changes are the reason for these dark spots, but the details are not clear.

The best way to prevent melasma is to protect yourself from the sun....If you're going to be going out in the coming months, buy a brimmed hat and apply sunscreen before going out.
Hormones can make some women love pregnancy, but they can also make others uncomfortable....if these changes bother you, just remember that you're almost halfway through your pregnancy.

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sciatic nerve pain

If you have intermittent pain that radiates from one of your legs to your upper body, it could be from the sciatic nerve..Sciatica is the largest nerve in your body and the pain can start in your lower back or thigh and travel down your legs..Researchers aren't sure why pregnant women experience this pain, but it may be due to pressure on the baby's nerve. until That the pain doesn't go away....Also try lying on your side with a pillow between your knee and ankle.
You can also try swimming...Swimming may help relieve some of the discomfort, plus it's great low-intensity exercise during pregnancy.

Things you should do this week for a healthy pregnancy

Wear shoes with flat heels or short heels.... As your belly continues to grow, try to keep your balance.... To manage the shift in your center of gravity, you should ditch the high heels for now.
Are you worried about finding out if your future child is a boy or a girl? Then you may be able to find out at your next ultrasound, which for most women is between 16 and 20 weeks. In preparation for this big reveal (or shortly thereafter), you may want to think about baby names, if you haven't already.

Schedule a prenatal massage... As your body changes, you may have new aches and pains... A prenatal massage is a great way to pamper your body and help relieve discomfort... It's also a great way to relax... Just make sure you find someone trained in pregnancy massage and be sure to let them know how many months into your pregnancy you are.

Time to contact a gynecologist

Although the chances of miscarriage are reduced at this stage, there is still a risk... If you have vaginal bleeding, fluid leakage or severe abdominal pain, call your gynecologist immediately... You should also call your doctor if you have a fever.

Source: healthline

For advice on childbirth and pregnancy, you can refer to doctors specializing in childbirth and pregnancy.