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Updated 08 October 2018

Week 3: 37 weeks to go!

Counting from the first day of your last period, you have 37 weeks to go. Let's check in on your and baby.

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Welcome to the very start of your pregnancy journey.

Your baby's progress:  

  • Congratulations! One lucky sperm has beaten millions of his competitors to be united with the ovum (egg).
  • A fertilised ovum is called a zygote. The zygote floats down the Fallopian tube and divides into two identical cells.
  • The cells continue to divide at a rapid rate.
  • By the sixth day, a cluster of more than 100 cells has been produced.
  • The chromosomes of mother and father form the chromosomes of the baby.
  • Your baby's gender is determined by the sex chromosomes in the father's sperm.
  • By the end of the first week the cells have formed a blastocyst – a hollow, fluid-filled cluster of cells. The next two weeks are known as the germinal period.

Good to know: 

  • When two ova (eggs) mature and are fertilised during a single ovulatory cycle, dizygotic (fraternal) twins are formed. The majority of twins occur in this way. Twins developing from the division of a single fertilised egg are known as monozygotic (identical) twins.

 
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