Whether you’re still in the trying stages or have just learned that you’re pregnant, knowing what to expect each week can be essential.
Dr Sonya Jessup is an experienced Fertility Specialist and Gynaecologist at Demeter Fertility. She told Mamamia about the early stages of pregnancy week by week. (You can see the guide through weeks 1- 4 here.)
Similar to weeks one to four, a lot is happening during this period, says Dr Jessup.
“At five and a half weeks what we see on a scan is a little sac inside the uterus about a centimetre or a centimetre and a half,” she says, adding, “By the time you get to six and a half weeks, the baby is now measuring about 3 mm in length. Occasionally you can see a foetal heart [on scans] but not always.”
By this point, the baby’s heartbeat is also “somewhere between about 100 and 180 beats per minute,” Jessup says.
“The foetal heart obviously has to start from nothing. If you do a very early scan and maybe you were just six weeks the foetal heart rate is often lower than that, it’s 60. If, later on, the foetal heart rate is 60 it can mean a miscarriage might occur but don’t forget the heart rate has to start slowly and then speed up, so at five to six weeks it will go through a phase where it’s about 60 then 80 then 100 then between 120 and 180 beats per minute,” said Dr Jessup.