Sixth week of pregnancy: what can be seen on ultrasound and how does the size of the embryo change during this time? Why is the measurement of beta hCG in the blood tested? What symptoms can be caused by the 6th week of pregnancy and which are the most frequently mentioned on the forum for expectant mothers?
The sixth week of pregnancy is the beginning of more serious ailments, but also the long-awaited opportunity to see the embryo and its heart functions on the monitor during vaginal ultrasound. Hormonal changes have a great influence on how the expectant mother feels. Performing a set of tests ordered during a medical visit confirming pregnancy allows you to get rid of at least some of your fears and uncertainties.
6th week of pregnancy: USG abdominal or vaginal?
One of the first associations with pregnancy is an ultrasound examination, which involves moving the transducer over the expectant mother's abdomen. At six weeks of pregnancy, it's still too early for this; at this stage, as in previous weeks, a transvaginal (internal) ultrasound is performed. The difference is in what is visible, because at six weeks of pregnancy, a transvaginal ultrasound will reveal not only the gestational sac but also the embryo within . However, the size of the embryo at six weeks of pregnancy means it appears as a mere dot on the ultrasound printout.
Another test that can be performed at 6 weeks – in addition to an ultrasound – is the measurement of blood levels of beta hCG , a hormone (human chorionic gonadotropin), which increases during pregnancy. At this stage, beta hCG levels can reach up to 31,795 mIU/ml – higher levels may indicate, for example, a twin pregnancy. Home pregnancy tests also measure beta hCG levels, but in urine, which is a less accurate method.
Visit to the gynecologist in the 6th week of pregnancy
For many women, a visit to the office around the 6th week of pregnancy is the first time they're unwell and confirm their pregnancy. The doctor typically performs a gynecological examination , especially if a transvaginal ultrasound machine isn't available on-site. At 6 weeks of pregnancy, the doctor can assess whether the vagina is loose and the cervix is also bruised. This is due to the effects of progesterone. The gynecologist should also weigh the patient, check her blood pressure, and perform a breast examination.
During the visit, it is important that the expectant mother can describe in detail how she feels at week 6 and what ailments she has had so far. Some symptoms can only be noticed by her - talking to your doctor about them gives you a chance to react quickly if you need to, and this can prevent unwanted complications.
Examination at 6 weeks of pregnancy
At week 6, during your pregnancy confirmation visit, your doctor may order the following tests:
- general urine examination;
- blood tests - blood count, blood group and Rh determination, immune (anti-Rh) antibodies, blood glucose level;
- testing for hepatitis B and C;
- dental control;
- risk assessment of depression.
As part of the blood test , a TSH level is also recommended to rule out thyroid disease. The woman is also checked for HIV, toxoplasmosis, rubella, or syphilis . This is because these diseases can be very dangerous for the pregnancy and the baby's development. After a transvaginal ultrasound at 6 weeks of pregnancy, a Pap smear and vaginal microbiology test can also be performed—and even necessary, if not previously performed.
The size of the embryo and follicle at 6 weeks of pregnancy
Embryo size is determined by crown-rump length (CRL), measured from the top of the skull to the buttocks. At the end of the 6th week of pregnancy, a transvaginal ultrasound will reveal an embryo measuring 3 mm. The gestational sac measures 3-10 mm at 6 weeks .
The size of the embryo at 6 weeks of pregnancy makes it appear as a mere speck on an ultrasound printout, even though it grows and develops very rapidly. The central nervous system, digestive system, and excretory system are beginning to form, the heart chambers are forming, and the limbs are already clearly defined, though still fused to the rest of the body. The heart begins to beat, meaning it begins to contract, as early as 22 days after fertilization. When the embryo exceeds 4-5 mm in size, heart activity should be clearly visible on ultrasound.
6th week of pregnancy - characteristic symptoms
During this time, you should expect characteristic morning sickness . In the sixth week of pregnancy, it can sometimes take the form of severe vomiting that lasts all day, as evidenced by numerous forums for expectant mothers. Mood swings and emotional rollercoasters are also common. Such symptoms in the sixth week of pregnancy are primarily related to hormonal changes, but also to uncertainty and fears about the future. Some women use the bathroom more often than usual during this time, which, along with other discomforts, can make being away from home a bit uncomfortable. However, the belly remains flat at this time, and the pregnancy is not visible from the outside.
In addition to nausea and frequent bathroom visits, expectant mothers may experience increased sensitivity to odors, which intensifies discomfort. During this time, using an air purifier at home can provide significant relief by reducing the intensity of unpleasant odors and potentially harmful pollutants. Air purifiers can also help reduce the presence of allergens and bacteria, which is important for pregnant women, who are particularly vulnerable to infections.
On the forum for expectant mothers, the question of how well you feel in the 6th week of pregnancy often appears - sharing experiences can be invaluable support, but it is best to go to the gynecologist with specific questions about the symptoms you experience.
From where spotting in the 6th week of pregnancy?
At this stage, sporadic, trace vaginal bleeding occurs in about 20% of women. Hormonal changes are usually to blame, causing increased blood flow to the walls of the vagina and uterus. This can lead to the rupture of delicate blood vessels, causing spotting.
Progesterone deficiency may also become apparent in the sixth week of pregnancy . Adequate secretion of this hormone is crucial for the course of pregnancy, enabling embryo implantation in the uterus and its subsequent development. Excessively low blood progesterone levels in the first weeks of pregnancy increase the risk of miscarriage and may also indicate an ectopic pregnancy.
6 weeks pregnant - abdominal pain, breasts and other ailments
Spotting in the 6th week of pregnancy isn't the only unpleasant symptom. Although the embryo is very small at 6 weeks, a woman's body is already preparing for its larger size – the ligaments of the uterus begin to stretch. This is one of the reasons for abdominal pain in the 6th week of pregnancy . Unless it's severe and accompanied by strong cramps, it's not cause for concern, although it's worth discussing this type of discomfort with your doctor during your check-up. Abdominal pain isn't the only symptom, as in the 6th week, expectant mothers may also experience breast tenderness. As a result of hormonal changes, fluid retention occurs, which is evident in their enlarged and more sensitive breasts. Other unusual but quite common symptoms in the 6th week of pregnancy include a metallic taste in the mouth and excessive salivation.
Consultation:
Ph.D. n. med. prof. IMID Tadeusz Issat - Head of the Obstetrics and Gynecology Clinic at the Institute of Mother and Child;
Maria Krowicka-Wasyl – resident physician during specialization in gynecology and obstetrics, Clinic of Obstetrics and Gynecology at the Institute of Mother and Child.
Źródła:
Fetal Size and Dating: Charts Recommended for Clinical Obstetric Practice, ULTRASOUND, August 2009, Volume 17, No. 3
Estimating Fetal Gestational Age, Radiology Key
