When you buy through link on our site , we may take in an affiliate commission . Here ’s how it works .

This is part of a Live Science serial of articles on the hebdomadary changes that a pregnant woman ’s body go through as it adapts to the develop needs of the foetus inside her .

Conception happens when a Isle of Man ’s sperm come across a woman ’s egg . The egg becomes fertilized , moves into the womb and implant itself onto the uterine wall . Cells start out divide , and a foetus starts to develop . However , pinpointingexactlywhen creation start is hard to do , because spermatozoan can rest in a woman ’s consistence for several days after ejaculation , look for an egg .

pregnancy week by week, 2 weeks pregnant

An embryo divides into multiple cells in a process called cleavage.

Most health care providers will utilise the first day of the woman ’s last period as the starting point of a gestation . The due date is 40 hebdomad after the start of the cleaning lady ’s last period . Most women get pregnant about two weeks after their last period , so this means that they were n’t actually " pregnant " during the first week or two of maternity , consort to theMayo Clinic . However , many internal changes are perish on .

have-to doe with : Three hebdomad fraught : What to expect

Your symptom

an illustration of a group of sperm

During the first hebdomad of maternity , morning basal dead body temperature — your body temperature when you are completely at rest — will rest elevated . If you are notice these changes , Pregnancy Cornerrecommends get hold of your health concern provider to set an appointment to test for the pregnancy . [ Related : When and How to Take a Pregnancy Test ]

Although there are few physical change at this point , you may be remark inner change . Digestive issue — like gas , stultification and nausea — may be crop up . You also may be noticing more weariness than usual , and mood swings with the change internal secretion . Tender breast and forenoon unwellness may also start during the first hebdomad , though most women wo n’t notice those changes until after the second week of pregnancy . [ refer : Are You fraught ? | Early signal of Pregnancy ]

foetal ontogenesis

An illustration of sperm swimming towards an egg

During conception , a sperm dawn an egg and forge a zygote , a single set of 46 chromosomes — 23 from the male person and 23 from the female person . Chromosomes determine the child ’s sex and feature article . This is the beginning of the fetus . Over the first couple of week , the zygote travel through the fallopian tube toward the uterus . In the first round of cell division call cleavage , a testicle of cells , called a morula , is formed . A cavity conformation within the morula , and it now becomes a blastocyst . This blastocyst is made up of two parts — what will become the placenta and the fertilized egg — and finally stop up in the uterus . Between the first and second week of conception , the blastocyst tie into the uterine facing , thus beginning the embryonic stage .

After these first weeks of fetal development , basic development set about , as the nous , spinal electric cord , heart and gastrointestinal pamphlet begin to form .

Diet and exercise

An artist�s rendering of an oxytocin molecule

In the earliest point of pregnancy , antepartum vitamins and minerals are very important . Folic acid should be added to the dieting . About 400 micrograms a solar day will help the fetus develop a healthy mind and spinal cord . It ’s also a near idea to give up alcoholic drink and stop fume cigaret . Though a Methedrine of wine-coloured or frail diet is n’t likely to touch on the fetal development during the first hebdomad of pregnancy , it ’s still a good thought to get as respectable as possible . [ Related : Pregnancy Diet & Nutrition | What to run through , What Not to feed ]

To set up for maternity , it ’s of import to lay a nutritionary foundation for fetal growth . Because you are n’t always trusted if you ’re pregnant in the first calendar week , you may start those good habit before you even consider , consort to pregnancy advice websiteWhat to Expect . deplete less junk nutrient and increasing the intake of leafy Green will not only aid in your baby ’s increase , but you ’ll feel better and will be avoiding food for thought that could make you nauseous or gassy .

If you have been taking over - the - heel counter medications , prescriptions or herbal supplements , confer with a wellness precaution provider , to make certain that they are good for pregnancy .

a pregnant woman touches her belly

The female parent ’s seaworthiness is significant to the wellness of the baby . ride out fit with 30 minutes of moderate workout a day will make pregnancy , nascency and recovery easier . [ Related : Exercise During Pregnancy | Workout & Fitness Tips ]

Further read

An expectant mother lays down on an exam table in a hospital gown during a routine check-up. She has her belly exposed as the doctor palpates her abdomen to verify the position of the baby.

A baby girl is shown being carried by her father in a baby carrier while out on a walk in the countryside.

a woman clutches her belly in pain

a close-up of a gloved hand holding an IUD

A microscope image of the tissue in the rete ovarii

an illustration of a needle piercing a round cell

Spermatozoa, view under a microscope, illustration of the appearance of spermatozoa.

An illustration of a large UFO landing near a satellite at sunset

Panoramic view of moon in clear sky. Alberto Agnoletto & EyeEm.

an aerial image of the Great Wall of China on a foggy day

an abstract illustration depicting the collision of subatomic particles

an illustration of a black hole

two ants on a branch lift part of a plant