Early Pregnancy Problems

This video, titled "Early Pregnancy Problems" by Gynae Consultant, reviews the parameters of the first trimester, regular diagnostic timelines, and the identification, causes, and treatment pathways for three common early pregnancy complications.

The First Trimester and Normal Development

• Timeline: Pregnancy dating is calculated from the first day of the last menstrual period (LMP). The first trimester—considered early pregnancy—lasts from this point until roughly 14 weeks.
• Ultrasound Milestones: A safe, transvaginal (internal) scan is standard to evaluate early development:
  • 4 Weeks: The gestation sac becomes visible.
  • 5 Weeks: A ring-like structure called the yolk sac appears.
  • 6 Weeks: The fetal pole or early embryo can be identified.
  • 7 Weeks: A visible fetal heartbeat should be detectable.

1. Miscarriage

Miscarriages are unfortunately very common, affecting 15% to 30% of early pregnancies. They typically present with bleeding or lower tummy pain.

• Causes: The majority of early miscarriages are driven by one-off chromosomal or genetic abnormalities that do not reflect any underlying genetic disorders in the parents. Recurrent miscarriage (three or more consecutive losses) is rare, affecting less than 1% of women, and requires detailed investigation.
• Categories:
  • Threatened Miscarriage: Bleeding occurs, but an ultrasound confirms the pregnancy is still intact and viable.
  • Missed Miscarriage: The pregnancy has stopped developing without any bleeding or pain, and is incidentally picked up on a routine scan.
  • Pregnancy of Unknown Viability: A sac is visible inside the womb, but its contents are not definitive yet. Doctors will repeat the scan in 1–2 weeks to reach a firm diagnosis. A miscarriage is diagnosed if a sac exceeds 25 mm without contents, if a fetal pole reaches 7 mm without a heartbeat, or if no growth is seen over a week.
• Management: Treatment options include monitoring for a spontaneous resolution, medical management, or a surgical procedure.

2. Ectopic Pregnancy

An ectopic pregnancy happens when a fertilized egg implants outside the womb, most commonly inside a fallopian tube. It cannot grow there indefinitely and usually starts bleeding by 8 to 9 weeks. If left untreated, the tube can rupture, causing life-threatening internal bleeding.

• Signs: Continuous lower tummy pain that doesn't resolve with standard painkillers, combined with an altered or failing hCG blood hormone level, warrants an immediate evaluation.
• Pregnancy of Unknown Location (PUL): If a pregnancy test is positive but an ultrasound cannot locate the pregnancy either inside or outside the womb, it is treated as a PUL. Doctors monitor hCG levels closely to rule out an ectopic pregnancy.
• Management:
  • Medical: Caught early, it can be treated with a methotrexate injection, which stops cell growth and allows the tissue to be naturally reabsorbed.
  • Surgical: If there is a risk of rupture, keyhole surgery is performed. The optimum treatment is typically removing the affected fallopian tube (salpingectomy), as a damaged tube increases the risk of a future ectopic pregnancy. In rare cases where the other tube is already missing or damaged, a surgeon may make a small incision in the tube to remove the pregnancy tissue while preserving the structure.

3. Molar Pregnancy

A molar pregnancy (trophoblastic disease) is a rare abnormality where the cells that are supposed to form the placenta grow at an unnaturally rapid rate, creating grape-like clusters inside the womb.

• Signs: It typically triggers heavy bleeding, severe vomiting (due to sky-high hormone levels), and high blood pressure. In most cases, there is no viable embryo present.
• Management: The abnormal tissue must be surgically removed and checked under a microscope. Some cases require close, long-term monitoring of blood hormone levels to ensure that the tissue does not recur or spread.