Week 1: In the begining.......

Fetal development in pregnancy week 1:


embryo in first month
It’s been a momentous past couple of days—even if you don’t know it
yet. At some point roughly 1.5 – 3.5 million sperm took aim at your
fallopian tubes and one superior little seed hit the target spot on.
The now fertilized egg is still inside your fallopian tube and is
already merging with the sperm to become a zygote. Cell multiplication
is occuring at an astonishingly rapid rate. Your little zygote will
spend the next 7-10 days dividing and multiplying as they slowly
descend into the uterus, where it will nestle into the already cozy
blood-rich uterine wall. The implantation process may result in a
little spotting for some, caused by the sloughing off of uterine wall
at the implantation site. This is perfectly natural and not a cause for
concern. When your little zygote is finally implanted, it is a
blastocyst measuring about 0.1 – 0.2 mm. This will be your baby’s
spatially-challenged home for the next 38-40 weeks.

And how's mom doing?
Your body is clever enough to recognizing this dynamic little zygote
and is already producing Early Pregnancy Factor (EPF) protein, an
immunosuppressant which will effectively keep your body from rejecting
your growing zygote. What’s more, you’ll continue to produce estrogen
and progesterone ceasing You won’t ... express any
other of the main symptoms of pregnancy at this point, but ... soon
your hormones will be fluctuating more intensely than any other time in
your life. further ovulation. You won’t feel nauseous or express
any other of the main symptoms of pregnancy at this point, but get
ready: soon your hormones will be fluctuating more intensely than any
other time in your life and you and everyone close to you will be
noticing. If you’ve been planning this pregnancy and have been
monitoring your morning basal body temperature, you will see that your
temperature remains elevated beyond day 16 of your Luteal Phase (post
ovulation). This will be the first physiological sign that you’re
pregnant!