Six weeks of pregnancy is about 1 month and 2 weeks. At this stage, the first signs of fetal development may be visible on an ultrasound, although this can vary.
However, a first-trimester ultrasound is usually done between 11 and 14 weeks of pregnancy. An ultrasound during this period is mainly important for checking the baby’s early development and confirming gestational age.
In general, you do not need to convert pregnancy weeks into months, since pregnancy is typically tracked by weeks. However, if you have questions about how to calculate your gestational age, it is best to talk to an OB-GYN or midwife. It is also important to follow the prenatal care schedule recommended by your provider.