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Baby on board! Since your due date is calculated by conception date, or the first day of your last period, you technically are not pregnant in weeks 1-2. But week 3, now that\u2019s where the magic happens!<\/p>\n\n\n\n

You probably have no idea that you\u2019re actually <\/em>pregnant yet, as it\u2019s still a little early to tell at 3 weeks pregnant. You have recently ovulated and fertilization has taken place, but it is not quite yet time to miss a period!<\/p>\n\n\n\n

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Baby Growth at 3 Weeks<\/h2>\n\n\n\n

You wouldn\u2019t know it yet, but wow, how your baby is growing! <\/p>\n\n\n\n

The winning sperm met an egg sometime this week in your fallopian tubes,\u00a0your genetic material combined, baby\u2019s sex is determined, and your single-celled \u201czygote\u201d started traveling through the fallopian tube.\u00a0Voila \u2013 you made a baby!<\/p>\n\n\n\n

The zygote typically has 46 chromosomes \u2013 23 from the biological mother and 23 from the biological father. These chromosomes determine your baby\u2019s sex and physical traits.<\/p>\n\n\n\n

Your baby is currently a tiny ball of cells that are rapidly dividing. <\/strong>The cells in the middle of the \u201cball\u201d become the embryo and the cells on the outside of the \u201cball\u201d become the placenta; the organ that carries oxygen and nutrients to your baby. As cells divide, the zygote becomes a blastocyst over a period of about 5-6 days and will soon be ready for implantation.<\/p>\n\n\n\n

Once the blastocyst makes its way to your uterus, it\u00a0takes an additional 3-5 days for it to implant in the uterine lining, making the total travel time from ovulation to implantation about 8-14 days. This is why you probably have no idea you\u2019re pregnant yet!<\/p>\n\n\n\n

\"Fetal<\/figure>\n\n\n\n

You & Your Body at 3 Weeks Pregnant<\/h2>\n\n\n\n

So, what\u2019s going on with you? Eh, probably not too much yet.<\/p>\n\n\n\n

While some people have no pregnancy symptoms yet, others may detect some differences. Bloating and mood swings are both common symptoms at this stage. These symptoms are due to an increase in the production of hormones estrogen and progesterone. Some light cramping or spotting\u00a0is also common. Both of these are signs\u00a0of implantation, where your little ball of cells settles in the uterine wall, getting nice and cozy for the next 9 months. <\/p>\n\n\n\n

You probably have not missed your next period yet, but you should soon! We can thank hormones for the bloating we think is a baby bump, but your baby is still too small to see.<\/p>\n\n\n\n

Typical Symptoms at\u00a0Pregnancy Week 3<\/h2>\n\n\n\n

During this week, if you have not noticed any symptoms just yet, that\u2019s okay. Early pregnancy symptoms vary from person to person and you may not start to feel anything until week 5 or 6. Most pregnancy symptoms are caused by the pregnancy hormone hCG, which is probably not present yet, but you\u2019ll get there.<\/p>\n\n\n\n

Some symptoms that you may start to experience during week 3: <\/p>\n\n\n\n