At 18 weeks pregnant, others may begin to notice that you're expecting. This week, you may be feeling your baby move, and you may get the opportunity to see your baby during an ultrasound. Show
18 Weeks Pregnant Is How Many Months? 4 months and 2 weeks Which Trimester? Second trimester How Many Weeks to Go? 22 weeks Your Baby's Development at 18 WeeksAt 18 weeks, baby measures a little over 5 3/4 inches (14.7 centimeters) from the top of their head to the bottom of the buttocks (your doctor may call this measurement the crown-rump length). The average height for a baby at 18 weeks from the top of their head to their heels (known as crown-heel length) is approximately 8 1/3 inches (21.2 centimeters). This week the baby weighs almost 8 ounces (222 grams). Verywell / Bailey MarinerSleepYour baby-to-be is practicing their napping skills. The internal clock that regulates sleeping and waking throughout the day is developing and will become more organized as your baby continues to grow. Nervous SystemBaby is also beginning to form myelin. Myelin is a mix of fat and protein that insulates and protects nerve cells in the nervous system, including the brain and the spinal cord. It also helps messages travel along the nerve pathways faster. Reproductive SystemWhile your baby's reproductive system is still developing, at this stage, the doctor or ultrasound tech can determine the baby's sex visually with a high degree of accuracy. Explore a few of your baby's week 18 milestones in this interactive experience. Your Baby's Ultrasound: What to ExpectYour Common Symptoms This WeekThis week, you're more likely to look pregnant, and you have a better chance of feeling your baby move. But, as your waistline expands, you may also feel off-balance as you adjust to your changing body. Dizziness from a natural dip in blood pressure is also common during the second trimester. Feeling MovementSome expecting parents, especially those who have been pregnant before, may have already started to feel baby flutters. For many first-time parents-to-be, feeling those first little movements or kicks called quickening may beginthis week. But not feeling baby move just yet doesn't mean there's anything wrong. Some pregnant people don't feel anything until week 20 or even later. Baby BumpYour uterus is continuing to expand, and it's making your pregnancy more and more visible. Of course, everyone's body is different. You may have a very obvious baby belly, or you may just have a little bump that's barely noticeable to others. You're more likely to have a bigger bump if you've been pregnant before. Balance IssuesAs your belly grows, your body shape and your center of gravity shifts. Add to that changes in your muscles and joints, and you can find yourself a little off balance. You may feel unstable, wobbly, and even begin to trip. Reaching forward can also become more difficult. Low Blood PressureSome pregnant people see a natural dip in their blood pressure during mid-pregnancy. These slight changes are not typically dangerous. However, low blood pressure can lead to fatigue, dizziness, and feeling faint. Not all those expecting have the mid-pregnancy dip. Blood pressure changes during pregnancy vary greatly depending on your health, history, and genetic background. Self-Care TipsYou may want to learn how to combat dizziness this week. It's also a great time to think about doing something special for yourself. Dealing With Low Blood PressureYou may not feel any different, even if your blood pressure does drop a bit. But, if you feel a little dizzy or lightheaded, you can try:
Dizziness could also be a sign of low blood sugar or anemia, so be sure to mention it to your doctor. A Little PamperingYou've been going through a lot of physical and emotional changes in the last few months. If you can swing it, take a little break to do something for yourself. You could spend a few hours or a day with your friends or your partner at a spa or nail salon. A prenatal massage might be a nice splurge, but a hair cut, manicure, and pedicure can also get you feeling revived and reenergized. Just be sure to let everyone who works with you at the spa or salon know that you're pregnant. Most treatments, such as manicures and hair coloring, are safe once you enter your second trimester, but limiting the use of chemicals and staying in a well-ventilated area is always safest. You can check with your doctor's office if you have questions about any treatments. Of course, not everyone enjoys the salon. Maybe you would rather spend some quality time with your partner or friends at dinner or a movie. The important thing is to take time to do what makes you happy. Advice for PartnersThere’s a lot to prepare for before the baby arrives, including interviewing and choosing a doctor for your child. You can help start the search by getting some recommendations from family, friends, other parents, or even your own physician. There are many things to consider when choosing a doctor. You may prefer the intimacy and specialization of private pediatric practices. Or, you may value the benefits of choosing a pediatrician affiliated with a medical care facility, such as easier electronic medical record referencing (for family history) and the convenience of scheduling several visits for members of the family all on the same day, in the same place. Once you’ve narrowed your list of candidates, team up with your partner and schedule some doctor meet-and-greets. At these sessions, you can discuss basic issues, including appointment availability, weekend coverage, hospitals the practice is affiliated with, and what insurance they accept. You’ll also want to come armed with more personal questions on topics such as:
These meetings are common practice (and are usually free), so don’t worry about pediatricians accommodating or charging for them. At Your Doctor’s OfficeYou may be scheduled for prenatal testing this week.
Second Trimester UltrasoundThis week you may get to see your baby. The big, mid-pregnancy ultrasound will most likely take place between 18 weeks and 22 weeks. This ultrasound goes by a few different names, such as:
This ultrasound provides your doctor with detailed information about your baby and your pregnancy. It includes an examination of the baby's body parts, including the:
It also looks at and measures the umbilical cord, the placenta, and the amniotic fluid. During this ultrasound, you can learn the sex of your baby or babies. If you don't want to know this information, be sure to tell your doctor and the ultrasound tech in advance. Upcoming Doctor’s VisitsSpecial ConsiderationsYour doctor may recommend more detailed prenatal testing in certain situations. Two tests that are performed at or around 18 weeks or after are fetal echocardiogram and fetal blood sampling. Prenatal Heart UltrasoundA fetal echocardiogram is a special ultrasound of the baby's heart. The ultrasound uses sound waves to show the parts of the heart and how the heart is working. It also shows the blood flowing through the baby's heart and can pick up problems with the baby's heart rate or rhythm. Your doctor may recommend this test if:
This procedure is typically performed between 18 weeks and 22 weeks. It is similar to and as safe as a regular ultrasound. Fetal Blood SamplingCordocentesis is a prenatal test where blood is removed from the umbilical cord to test the baby for anemia or other blood disorders. It is also a way for doctors to treat the baby for certain conditions since they can give medication or a blood transfusion directly to the baby. This test may be recommended if the baby is at risk for severe anemia or another blood disorder. It is the only test that can get directly to the baby's blood and circulation. In the past, fetal blood sampling was also used to test for infections and chromosomal abnormalities. However, with advances in technology, safer prenatal diagnostic tests such as chorionic villus sampling (CVS) and amniocentesis are now much more common. Fetal blood sampling is not without risks. So, your doctor will discuss the benefits and the possible complications with you. Complications include:
A Word From VerywellAt 18 weeks, your baby is growing and moving all around. This week, you may feel some of those moves and get to see your child demonstrate them on the ultrasound screen. If you don't get to peek inside the womb this week, you'll probably get the chance within the next few weeks. Is 18 weeks considered 5 months pregnant?18 weeks pregnant is how many months? If you're 18 weeks pregnant, you're in month 5 of your pregnancy. Only 4 months left to go!
How many weeks pregnant is 5 months pregnant?What Happens at 5 Months of Pregnancy? 20 Weeks Pregnant.
How many weeks is 6 months pregnant?What Happens at 6 Months of Pregnancy? 24 Weeks Pregnant.
How many months can be formed with 18 weeks?18 weeks pregnant is how many months? At 18 weeks, you're about four months pregnant.
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