Week 1: In the beginning...
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.
Fetal development in pregnancy week 2:embryo in first month Your little blastocyst is now separating into two distinct parts: the amniotic cavity (or yolk sac) and the embryo (your baby-to-be). The yolk sac’s main job is to protect and nourish your baby until the placenta is fully formed. Right now, the placenta is just beginning to take shape, but won’t be complete for another 8 weeks or so. The beginnings of the umbilical cord are visible and partly functional, although it is still not fully formed.
Fetal development in pregnancy week 3:embryo in first month Although your belly is still the same size and shape as it was pre-pregnancy, a plethora of amazing and dynamic changes are taking place despite this fact. Right now your little zygote is already 1.5 – 2.5mm in size. This is quite a change from the microscopic pack of cells you had just two weeks ago. Your microscopic little one is already composed of three complex “germ” layers: the ectoderm, endoderm and mesoderm. Although you could hardly see them at this point, these layers are the beginnings of your baby's nervous system and brain, stomach and inner organs, and skeleton and connective tissue. Your baby is also starting to take on recognizable physical dimensions somewhat comparable to a very tiny pear. The round part of the pear will eventually become the head and the pointy part will be the spine. Perhaps the best part of this week is that somewhere around the 21st day, your miraculous little pear will have a beating heart, although the heart chambers and valves will not be completely developed for another couple weeks.
Week 4: Wag that tail!
Fetal development in pregnancy week 4:embryo in first month By the end of this week the round and pointy ends of your little pear-shaped baby will be slightly more exaggerated and their body will look more like that of a miniature manatee. Despite your baby not looking particularly human without any eyes, ears or mouth, the earliest developments of what will become the larynx, internal ear, and eye lens are already forming, although you’d have to be a trained expert to recognize them for what they’re going to be in the future. Likewise, tiny bumps are forming on your little embryo which will eventually be their cute little arms, elbows, fingers, legs, knees and toes. What’s more your little swimmer will have a teeny tiny tail by the end of this week-- but don’t worry, it’s just the end of their developing spinal cord! A microscopic photo would reveal what seems to be their vertebrae filling out the spine and tail. Although they aren’t bones yet, but rather, the “bone seeds” that will give rise to your baby's tiny vertebrae, ribs and sternum.
Week 5: Teeny tiny baby steps
Fetal development in pregnancy week 5:embryo in second month The changes to your growing embryo are not quite as drastic this week as they've been in the last few weeks. Growth is now largely focused on their little head, which is starting to develop much more rapidly than the rest of their tiny body. This is because their amazing brain is undergoing some very crucial and rapid development in order to effectively regulate their heart rate, blood circulation, and other vital functions. As for the rest of their miniature body, what were simple limb buds last week are limb flippers this week and the tail is more expressed. Amazingly, within a mere five weeks your little miracle is already developing the rudimentary forms of their liver, pancreas, lungs, stomach and nasal pits while their little heart is already increasing its circulation. Your baby is now a whopping 4-6mm in length
hye baby ku sayang
mama syg baby so much
i love u
and hope the day
by u my baby