Every pregnancy is different, but most women experience a recognisable pattern of symptoms as each trimester unfolds. Understanding what is normal — and what warrants a call to your healthcare provider — can make the journey feel less daunting.
Conception typically occurs around day 14 of a 28-day cycle, but pregnancy is counted from the first day of your last period. In the first two weeks you are not yet pregnant in the clinical sense; weeks 3 and 4 are when fertilisation and implantation occur.
Some women notice implantation bleeding — light spotting 6–12 days after ovulation — as the embryo embeds in the uterine lining. A very sensitive home pregnancy test may show a faint positive from around day 10 after ovulation.
This is when most women discover they are pregnant. hCG (human chorionic gonadotropin) levels are rising rapidly, and a missed period is the most reliable early sign. Other symptoms that may appear include nausea and vomiting (commonly called morning sickness, though it can strike at any time), extreme fatigue, breast tenderness and swelling, frequent urination, and food aversions or unusual cravings.
By week 6–8, the embryo has a heartbeat detectable by ultrasound, and major organs are forming. This period is critical for development, making adequate folic acid particularly important.
Nausea often peaks around weeks 8–10 and then begins to ease for many women, though some experience it throughout pregnancy. The risk of miscarriage drops significantly after week 10, and many couples choose to share the news after the 12-week scan.
You may notice increased saliva, bloating, and mild cramping as the uterus expands. Mood swings are common as hormone levels fluctuate. Fatigue typically improves toward the end of the first trimester.
The second trimester is often the most comfortable. Energy returns for most women, nausea fades, and the pregnancy becomes visible. Between weeks 18 and 22, you may feel the first fetal movements — a fluttering or bubbling sensation.
New symptoms may include round ligament pain (sharp twinges in the lower abdomen), heartburn as the uterus presses on the stomach, nasal congestion, and leg cramps, particularly at night. Skin changes such as the linea nigra (a dark vertical line on the abdomen) and chloasma (darker patches on the face) are common.
As the baby grows rapidly, physical discomfort increases. Common third-trimester symptoms include shortness of breath as the uterus presses on the diaphragm, difficulty sleeping and finding a comfortable position, increased back pain and pelvic pressure, Braxton Hicks contractions (irregular, practice contractions that are usually painless), swelling of the ankles and feet, and frequent urination returning as the baby's head descends.
Between weeks 35 and 40 you may experience "lightening" — the baby dropping lower into the pelvis, which can relieve pressure on the diaphragm but increase pelvic discomfort.
At any stage of pregnancy, contact your healthcare provider immediately if you experience heavy vaginal bleeding, severe abdominal pain, sudden severe headache, visual changes, swelling of the face or hands, difficulty breathing, or a significant reduction in fetal movements after week 20.
Use our Due Date Calculator to estimate your expected delivery date, and our Pregnancy Week Calculator to understand exactly where you are in your pregnancy.
This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider regarding your specific situation.