Conception and Fertilization

This week you ovulated and now the moment you’ve been waiting for has finally arrived: You’ve conceived and your soon-to-be-baby has started on its miraculous transformation from single cell to baby boy or girl! Once the winning sperm makes its way through the egg’s outer layer, the now single-cell fertilized egg — or zygote — immediately forms a barrier to prevent other sperm from penetrating (sorry guys, too late). But your zygote doesn’t stay single for long: within days it divides into two cells, then four and so on, until the growing cluster comprises around 100 cells. Some of the cells will form the embryo; some will form the placenta — but for now it’s still a microscopic ball of cells that’s one-fifth the size of the period at the end of this sentence.


Tiny? Certainly. But don’t underestimate its potential. As it divides, the blastocyst, as it’s now called (don’t worry, you’ll come up with a cuter name soon!), makes its first solo trip, traveling this week from your fallopian tube to your uterus — a journey that takes around six days. There it will implant itself in the uterine wall and grow for the next nine months. Peel away that technical jargon and you’ve got yourself a baby-in-the-making, ready to begin the incredible journey that will end in your arms.

Boy or Girl?

So will this single-cell miraculously transform into a girl or a boy? Though it will be months before you’ll be able to find out for sure (if you choose to), that remarkable determination has already been made. Ready for a crash course in biology? The fertilized egg (aka your baby) contains 46 chromosomes — 23 from you, 23 from Dad. The mother (yes, that’s you!) always provides an X chromosome. The father can provide an X or Y chromosome. If the sperm that fertilizes your egg carries an X chromosome, the XX zygote will be a girl. If the sperm is Y-bearing, then your XY zygote will be a boy.


When does ovulation usually occur

How do I know if I am ovulating

What is cervical mucus

How to use Basal Body Temperature and cervical mucus to predict ovulation

Can’t we just try and see what happens

Once I can predict ovulation when should I have sex-or be inseminated

When is the best time to have sex for conception

Will it be harder to get pregnant if periods are irregular




Related Topics


 Overdue Pregnancy 

 Overdue Delivery Procedures