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For half of the first month you were not pregnant at all. Here is what that means for the wine at the wedding, the painkiller, the X-ray, and everything else on the list.
Reviewed by Dr. Grishma Ranjangaonkar, MBBS, DGO, ICOG Fellowship in Gynecological Endoscopy · Eva WomanCare Clinic, Vashi, Navi Mumbai
Almost every woman who has just seen a positive test arrives with the same two questions. What do I do now, and what about the things I did before I knew. The second one is usually the heavier of the two, and the arithmetic of how pregnancy is counted answers most of it: for the first two weeks of what is called your first month, you were not pregnant at all.
The short version
Almost everyone finds this confusing, and it is worth clearing up before anything else. Pregnancy is counted from the first day of your last period, not from conception. So by the time a test turns positive you are already called four weeks pregnant, even though fertilisation happened about two weeks earlier and implantation only a few days ago.
The reason is practical rather than biological. Almost nobody knows the date of conception. Everybody knows when their last period started, or can get close to it, and that gives a date that two different doctors will agree on.
That arithmetic also answers the question this article is mostly here for, which is what to do about the things you did before you knew.
This is the conversation we have more than any other with newly pregnant women, and it is almost always the same short list. Here are the straight answers.
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What happened
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Does it matter?
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What to do now
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If you are not sure how many weeks you are, our due date calculator will get you close, and the dating scan at the first visit will settle it properly. Our article on the first check-up sets out what to bring to it.
Plenty of women feel nothing at all in the first month and go on to have entirely normal pregnancies. Symptoms are not a scorecard and their absence is not a warning sign. If you do notice something, this is the usual order of arrival.
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What
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When it usually starts
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Worth knowing
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Severe pain on one side, particularly with shoulder-tip pain, feeling faint or dizzy, or bleeding after a positive test before you have had a scan. An ectopic pregnancy is uncommon but it is the reason nobody should manage early bleeding at home. Be seen the same day. Everything else in this article can wait for the booking appointment.
Myth
“Do not tell anyone until three months”
What is actually true
This is a social convention, not medical advice, and it can work against you. It is the reason so many women go through an early loss without support from anyone who knows. Tell whoever you would want beside you if things went badly. That is the only rule worth applying.
Myth
“Stop working, stop exercising, rest completely”
What is actually true
None of that is recommended and complete rest has never been shown to prevent miscarriage. Working, walking, exercising and climbing stairs are all fine in a normal early pregnancy. If there is a specific reason for you to do less, we will tell you exactly what and why.
Myth
“Take every supplement someone recommends”
What is actually true
Folic acid, and vitamin D. That is the list for most women in the first month. Anything containing vitamin A is actively best avoided, and multivitamins that are not designed for pregnancy sometimes contain it. More is not safer here.
Myth
“A very faint line on the test means it might not be real”
What is actually true
A line is a line. Home pregnancy tests detect hCG and they do not produce a faint line for no reason. What a faint line does not tell you is how many weeks you are or where the pregnancy is sitting, and only a scan answers that.
Gestational age counted from the first day of the last menstrual period, folic acid at 400 micrograms daily until twelve weeks, and the timing of the booking appointment follow NICE NG201 on antenatal care and NHS guidance on vitamins in pregnancy. Advice on paracetamol, non-steroidal anti-inflammatories and diagnostic imaging in early pregnancy follows standard UK prescribing and radiation protection guidance. Symptoms of ectopic pregnancy and the requirement for same-day assessment follow NICE NG126. This article is general information and does not replace an assessment with your own doctor, and no long-term medicine should be stopped without medical advice.
Dr. Grishma Ranjangaonkar
MBBS, DGO · ICOG Fellowship in Gynecological Endoscopy · Maharashtra Medical Council Reg. No. 2014041327
Dr. Grishma has more than fifteen years of clinical experience and practises at Eva WomanCare Clinic in Vashi, seeing women from across Navi Mumbai including Kopar Khairane and Turbhe. Her work spans fertility and pregnancy care, PCOS and menstrual health, and keyhole gynecological surgery.
What is normal week by week through the first twelve, and what needs a call today.
Work out which week you are actually in, before the scan confirms it.
What matters to eat, and the four nutrients that matter this early.
Sorted into go now, call today, or mention at the next visit.
That is genuinely the whole to-do list for the first month. Everything else waits for the booking visit, where the bloods, the dating scan and all the questions you have written down get dealt with in one appointment. We see newly pregnant women from Vashi, Kopar Khairane, Turbhe and Nerul every week.
