Your baby and the umbilical cord are experiencing a growth spurt this week. Your baby's sex can now be accurately detected on an ultrasound scan.
Ultrasound image of fetus at 17 weeks gestation.
The fetus now typically measures between 11.4cm and 12.7cm long (from crown to rump) and weighs around 100g. This increase in length and weight is larger than in previous weeks due to a growth spurt that is well underway. This growth spurt not only applies to the fetus, but also to the umbilical cord, which is thickening and growing stronger too. As well as a growth spurt, the fetus also experiences an energy burst – becoming more active over the coming weeks. This week could be the time that you feel the first movements of the fetus, although many women, particularly if it is their first pregnancy, do not feel fetal movement at this stage.
The skeleton, which is largely formed of cartilage at the moment, will start to harden during the course of this week and myelin (a protective coating) is forming around the spinal cord. Body fat is also beginning to develop. This will eventually help to maintain a constant body temperature. The brain now controls heart rate, irregular heartbeats are now rare and heart rate is usually between 140 and 150 beats per minute – twice the rate of an adult female.
You may find that your weight gain is now sufficientto affect your centre of gravity – making you feel off-balance. If you are struggling with your balance, it may be a good idea to avoid wearing high-heeled shoes. It is also around this time that many women begin to need to wear maternity clothes.
Although an increased need to urinate is a perfectly normal part of pregnancy, caused by a combination of increased hormone levels and the physical effects of the uterus pressing down on the bladder, you should look out for additional urine-related symptoms such as a burning sensation during urination. This could be an indicator that you have cystitis or a urinary tract infection (UTI). If you have any concerns, you should seek the advice of a health care professional.
You may also continue to, or start to experience a thin, milky vaginal discharge called leukorrhea. This is both normal and functional as it helps to keep the birth canal free from infection. You may be experiencing occasional dizziness or faintness. There are many possible causes for this, including hormonal increases and fatigue, however headaches and dizziness may also be the result of dehydration. Drinking plenty of fluids and avoiding diuretics such as caffeine can help with this.
Due to a combination of increased levels of progesterone causing blood vessels to dilate and a higher metabolic rate causing more body heat to be generated, many women suffer from hot flushes during pregnancy. Avoiding triggers such as alcohol, spicy foods and coffee may help to reduce hot flushes.
Vaginal bleeding is not normal at this stage. Some mild abdominal pain and backache is normal. Vaginal discharge should be of consistent milky colour and volume. If it should be pink or more voluminous you should see a medical professional. This is particularly true if you have had a previous late miscarriage, operation on your cervix or short cervix. This is also important if you are carrying more than one baby.
The midwife will be able to provide you with advice. The NHS will not routinely be able to offer you an ultrasound scan at this time.
General midwifery and medical advice is available in private clinics for which you do not require a referral letter. An ultrasound scan, called a reassurance scan at this stage can check the size and normality of the baby. It can also determine the sex of the baby quite accurately. If you are concerned about your cervix becoming short or have other concerns about your cervix then an ultrasound scan of your cervix can be reassuring. This gives a better assessment when performed through the vagina (you can request a female sonographer).
' Professional and reassuring 'Helen Campbell
The sonographer was ready as soon as I arrived, and she was extremely calming, personable and professional. The scan and blood test where efficient without feeling rushed and all very easy. These appointments can feel uneasy and make you feel anxious but I felt reassured and in professional hands the whole time
I saw Kate throughout my first pregnancy and am now doing so again with my second. She is absolutely amazing, she explains everything really clearly, and has answered all sorts of bizarre questions and worries I have had. On top of being clinically excellent she is also just the loveliest person and always a pleasure to see.Sarah Elliott
We had the harmony test with the Birth Company and had a reassurance scan with sonographer Kirsty McGarry who was absolutely lovely and really put our minds at rest. We had been scared by our NHS dating scan and left feeling like there was something wrong. We explained the situation and was treated very professionally and with good care. Also speedy appointments also as I had phone in the morning and got an appointment by afternoon. So thankful.Ashley and Tom
Really friendly, efficient service. Great experience overall. Had the Panorama. My appointment was with Kate who was absolutely fantastic. The results came really quickly. Have a comparison with private healthcare elsewhere and must say that The Birth Company was just how I would like to be treated when I pay for medical services - attentively, calmly, friendly, in a pleasant environment that doesn't look like hospital. Top marks!Anna
' Efficient, friendly and always on hand to provide last minute appointments 'Hannah Murphy
The Birth Company has been excellent, providing timely scans and blood tests during my IVF treatment abroad. Staff are always friendly and extremely efficient. I would highly recommend coming here.
' Professional and friendly 'Lyndsey Dilla
When I first contacted the Birth Company I spoke to Danielle. She was fantastic. She went above & beyond to put me at easy & make the journey from Kent as stress free as possible. Every staff member that myself and my husband have come into contact with have been approachable, professional and friendly. Kate scanned me the first time and put me completely at easy. Lisa on reception is professional and very approachable. Highly recommended
' Highly recommended 'Emelie
Donald was so lovely! I was so nervous as I have a bad history and he was super quick and confirmed my baby's heartbeat as quickly as he could. He spent time showing me the baby and the anatomy and it was the best money I have ever spent! The reception girls were lovely too - considering they deal with babies day in day out they were super excited for me! Thank you so much one and all! If only I lived in London and could have all my scans with you!
Great Portland Street