- Pregnancy Week by Weeks
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If you have your first scan this week, or if your gynaecologist mentioned hearing for a heartbeat at your appointment, there is something worth saying before anything else: this is often the week pregnancy stops feeling like a concept and starts feeling like a person.
The positive test told you something was happening. The missed period confirmed it. But a heartbeat, even the small, fast, faintly flickering one visible on a six-week scan, even before there is anything that looks like a baby in the way you picture one, is different. It is evidence, in the most direct sense, that there is a separate, working body in there, doing something entirely on its own. Many women describe this as the moment it became real in a way nothing before it had managed.
If that scan or that appointment is still ahead of you this week, here is what you are working toward, and what is happening either way.
Your baby at 6 weeks: from cluster to curve
Your baby is now approximately 4-6mm long, the size of a lentil, and has changed shape noticeably from last week. Baby is no longer a simple cluster of cells but a small, distinctly curved form, with the earliest hints of a head and tail end becoming visible.
The most significant event of this week is the heart. The primitive heart tube that began forming last week is now beating, not in the steady, controlled rhythm of a mature heart, but in the rapid, almost flickering way of a structure still finding its pattern. It may be visible on an early ultrasound this week, though whether it is detected depends on several things outside your control: the exact dating of your pregnancy, which can be a few days off from what the calendar suggests; the position of the embryo; and the quality and type of the ultrasound equipment used. If your gynaecologist looks for a heartbeat this week and does not find one, this is far more often a question of timing than of anything being wrong, sometimes ovulation happened a few days later than the calculation assumed, which means the pregnancy is genuinely a few days younger than the dates suggest. A follow-up scan a week later very often resolves the uncertainty with good news.
Baby’s brain and spinal cord continue developing rapidly from the neural tube that formed last week, brain growth during these earliest weeks happens at a pace that will never be matched again at any other point in her life. Tiny limb buds are appearing now too, small protrusions that will, over the coming weeks, become their arms and legs. They do not look like limbs yet. They are the foundation the limbs will be built from.
The earliest structures of baby’s face like the beginnings of eyes, ears, jaw and nose, are starting to emerge this week, alongside continued development of their liver, kidneys, lungs, and digestive system. None of it looks like a baby yet, not in any way you would recognise from a photograph. All of it is the blueprint from which the baby you will eventually hold is being constructed, one extraordinarily fast week at a time.
What you might be feeling and why week 6 often hits harder
If symptoms have not arrived yet, week six is one of the most common points for them to begin in earnest, as hCG and progesterone continue their rapid climb.
Morning sickness frequently makes its first real appearance around now, and despite the name, it has no respect for time of day. Nausea, occasional vomiting, sudden food aversions to things you previously loved, and a sharpened sensitivity to smell that can make a kitchen, a perfume, or even your partner’s normal scent suddenly unbearable — all of this is common at six weeks. If you are not experiencing any of it, that is equally normal. The presence or absence of morning sickness does not reliably indicate anything about how the pregnancy is progressing.
Fatigue at this stage can be genuinely overwhelming, not the kind of tiredness that responds to an early night, but a heaviness that persists regardless of how much you sleep. Your body is building a placenta, supporting extraordinarily rapid cell division, and producing pregnancy hormones at a rate it has never managed before. The exhaustion is the visible cost of work you cannot see.
Breast tenderness often intensifies further this week, soreness, fullness, increased sensitivity, and sometimes the appearance of more visible veins across the chest as blood flow increases to prepare for future milk production.
Increased sensitivity to smell deserves its own mention because it catches many women off guard with its intensity. Foods you have eaten your whole life, cooking smells from your own kitchen, perfume you wear every day — any of these can suddenly trigger nausea in a way that feels almost absurd given how familiar the smell is. This heightened olfactory sensitivity is a well-documented early pregnancy symptom and tends to ease, though not disappear completely, as the first trimester progresses.
Frequent urination, mood swings that shift within the same day, and a general sense of emotional unpredictability are all common companions to the physical symptoms this week. The mixture of excitement, anxiety, exhaustion, and occasional tearfulness, sometimes all within a single afternoon, is not a sign that you are not coping. It is hormones and a genuinely significant life event colliding at the same time.
If you have no symptoms yet
This remains one of the most common worries at six weeks, and the answer has not changed from last week: having few or no symptoms does not mean anything is wrong. Many entirely healthy pregnancies are remarkably quiet in these early weeks. Symptom intensity is not a reliable indicator of how well a pregnancy is progressing, however much internet culture suggests otherwise.
Early Pregnancy Symptoms: What Is Normal, What Helps, and When to Call Your Doctor
What a 6-week ultrasound can show — and what it sometimes cannot, yet
At around six weeks, an ultrasound may show the gestational sac, the yolk sac, a visible embryo, and — if conditions align — early cardiac activity. This is often the scan where many women see or hear evidence of their baby for the first time in a way that feels concrete.
It is also worth knowing, gently, before you go in: not seeing a heartbeat at exactly six weeks does not automatically indicate a problem. Dating in early pregnancy is an estimate, built from the date of your last period, and ovulation does not always occur exactly when the standard calculation assumes. A pregnancy that is genuinely five and a half weeks rather than six, because ovulation happened a few days later than expected, may simply not have a detectable heartbeat yet on the day of the scan — and a follow-up scan a week or so later very frequently shows everything progressing exactly as it should. If your gynaecologist suggests a follow-up scan rather than expressing immediate concern, this is the most common and most likely explanation.
Why folic acid still matters intensely this week
La neural tube — which becomes the brain and spinal cord — is still in a critical window of development at six weeks, and folic acid continues to play a protective role in reducing the risk of neural tube defects during this period. If you have been taking it consistently since before or from the early weeks of pregnancy, continue exactly as you have been. If there have been gaps, today is the day to close them. Consistency through these next couple of weeks matters more than almost any other supplement decision you will make in this pregnancy.
Eating when nausea makes it difficult
If morning sickness has arrived and eating has become genuinely hard, the goal for this week is not balanced nutrition in the textbook sense — it is simply getting enough in, in whatever form your stomach will currently tolerate.
Smaller, more frequent meals tend to be more manageable than three larger ones. Plain, bland foods — crackers, toast, rice — are often tolerated even when almost everything else is not, and there is no shame in living on these for a stretch if that is what works. Staying hydrated matters more than eating a perfectly varied diet right now; small sips throughout the day are often easier to manage than large glasses at once. Keep simple snacks within reach — beside the bed for the first thing in the morning, in your bag for when nausea strikes unexpectedly during the day.
If vomiting is frequent and persistent — multiple times a day, every day, with an inability to keep fluids down — this may be hyperemesis gravidarum rather than typical morning sickness, and it warrants medical attention rather than simply waiting it out. Contact your gynaecologist if this describes what you are experiencing.
What to do this week
Confirm your first antenatal appointment is booked, if you have not already, for the six-to-ten-week window most Mauritius gynaecologists recommend.
Keep taking folic acid daily, without gaps, given how critical this window remains for neural tube development.
Rest aggressively when fatigue hits. This is not the week to push through exhaustion to prove something to yourself or anyone else.
Eat what you can manage, when you can manage it, and let go of any expectation of perfect nutrition while nausea is at its worst.
Stay hydrated, particularly in Mauritius heat, where dehydration compounds nausea and fatigue considerably.
Next week your baby continues her rapid growth — facial features becoming more distinct, limb buds lengthening into the early shapes of arms and legs. Symptoms, for most women, continue intensifying through this stretch of the first trimester as hormone levels keep climbing toward their peak.
References: NHS — You and your baby at 6 weeks pregnant. nhs.uk. American College of Obstetricians and Gynecologists — Early pregnancy development. acog.org. World Health Organisation — Antenatal care recommendations. who.int. Ministry of Health and Wellness Mauritius — Maternal health guidelines.
Disclaimer: This article is for informational purposes only. Always consult your gynaecologist or midwife for guidance specific to your pregnancy. If you have concerns about pain, bleeding, or the absence of a heartbeat at your scan, discuss this directly with your gynaecologist, who can advise on appropriate follow-up.