Week 11 of Pregnancy

At week 11 pregnancy, your baby has reached approximately 41mm in length from head to bottom—roughly the size of a fig. This represents remarkable growth from just weeks earlier, as your little one continues developing at an extraordinary pace.

The most striking changes this week involve your baby’s facial features and limb development. According to the NHS guidance for 11 weeks pregnant, the fingers and toes are now separating out, complete with tiny fingernails beginning to form. Miniature ears are taking shape, and the head, whilst still proportionally large, is becoming more defined as the body grows rapidly.

Your baby’s vital organs are continuing their development, with the heart now beating strongly—a sight that often brings tremendous relief and joy to parents during their first scan. Although your baby is actively moving and kicking inside your womb, you’re unlikely to feel these movements for several more weeks.

A crucial transition occurs around this time as the placenta prepares to take over from the yolk sac in nourishing your baby. This handover process can affect your hormone levels, potentially making you feel more tired and emotional than usual. The placenta will become your baby’s lifeline, providing nutrients and removing waste products throughout the remainder of your pregnancy.

As you approach the end of your first trimester, your body continues adapting to support your growing baby. Your blood volume is significantly increased to support your growing baby, which can leave you feeling hot, sweaty, and occasionally dizzy—your body’s way of telling you to rest.

Common symptoms you might experience during week 11 pregnancy include:

• Aches and pains around your bump as muscles and ligaments stretch
• Continued nausea, though this often begins improving for many women
• Mood swings and emotional fluctuations
• Metallic taste in your mouth
• Breast tenderness and sensitivity
• Indigestion and heartburn
• Headaches and occasional dizziness
• Changes in food preferences and heightened sense of smell

If you experience severe abdominal pain, contact your midwife or doctor immediately, as this could indicate a complication requiring medical attention.

Your upcoming dating scan, typically scheduled between 11-14 weeks, represents a pivotal moment in your pregnancy journey. Understanding what to expect can help ease anxiety and allow you to fully appreciate this milestone.

The dating scan uses harmless ultrasound waves to create detailed images of your baby inside the womb. A trained sonographer will apply gel to your abdomen and move a transducer across your belly to capture the images. You’ll typically need a full bladder for this scan, so remember to drink plenty of water about an hour beforehand.

During the scan, the sonographer will:

• Measure your baby’s crown-rump length to accurately date your pregnancy
• Confirm your estimated due date
• Check for single or multiple pregnancies
• Ensure the pregnancy is developing normally within the uterus
• Visualise your baby’s heartbeat
• Perform the nuchal translucency measurement if you opt for screening

It’s entirely normal to feel a mixture of excitement and nerves before your first scan. Many parents worry about what the scan might reveal, whilst simultaneously looking forward to seeing their baby for the first time. Remember that the vast majority of scans show healthy, normally developing babies.

If you choose to have screening for chromosomal conditions, your dating scan will include a nuchal translucency scan. This important measurement forms part of the combined screening test for Down’s syndrome, Edwards’ syndrome, and Patau’s syndrome.

The nuchal translucency measurement assesses the fluid at the back of your baby’s neck. According to government guidance on combined testing, this measurement, combined with your blood test results and age, calculates the probability of your baby having certain chromosomal conditions.

The nuchal translucency scan can only be performed between 11 weeks + 2 days and 14 weeks + 1 day of pregnancy, making the timing of your scan crucial. This narrow window ensures the measurement’s accuracy and reliability.

Your combined screening results will be presented as a risk ratio, such as 1 in 1,000 or 1 in 150. It’s essential to understand that this is a screening test, not a diagnostic test—it provides information about probability, not certainty.

Results are typically categorised as:

• Lower risk: Usually defined as less than 1 in 150
• Higher risk: Typically 1 in 150 or higher

If your results indicate higher risk, you’ll be offered further testing options, including non-invasive prenatal testing (NIPT) or diagnostic tests like chorionic villus sampling or amniocentesis.

Non-invasive prenatal testing (NIPT) has revolutionised prenatal screening by offering a more accurate assessment of chromosomal conditions through a simple blood test. NIPT can be performed from 9-10 weeks of pregnancy and provides detailed information about the risk of Down’s syndrome, Edwards’ syndrome, and Patau’s syndrome with greater accuracy than traditional combined screening.

Many parents choose NIPT when combined screening indicates higher risk, as it can provide reassurance or guide decisions about further diagnostic testing.

Week 11 pregnancy often brings a sense of cautious optimism as you approach the end of your first trimester. Many couples begin considering when to share their pregnancy news, as the risk of miscarriage decreases significantly after the first trimester.

The anticipation surrounding your first scan can create considerable anxiety. Common concerns include:

• Fear that something might be wrong with the baby
• Worry about scan results and screening outcomes
• Anxiety about seeing the baby for the first time
• Concerns about pregnancy dating accuracy

Remember that these feelings are completely normal. Consider bringing a support person to your scan appointment, and don’t hesitate to ask questions if you’re uncertain about any aspect of the process.

As you prepare for your scan, it’s natural to think about the weeks ahead. The second trimester, beginning at week 13, often brings renewed energy and the exciting prospect of feeling your baby’s first movements. The successful completion of your first scan typically marks a significant psychological milestone in your pregnancy journey.

To ensure your scan appointment goes smoothly, consider these practical preparations:

• Arrive with a comfortably full bladder as instructed
• Bring a support person if desired
• Prepare any questions you’d like to ask the sonographer
• Consider bringing a small notebook to record important information
• Dress in comfortable, easily adjustable clothing

Remember that scan appointments can sometimes take longer than expected, so allow plenty of time and try to remain relaxed throughout the process.

Week 11 of pregnancy represents an exciting bridge between the uncertainty of early pregnancy and the confidence that comes with seeing your baby thriving on screen. At London Pregnancy Clinic, we understand the significance of this milestone and are here to support you through every step of your pregnancy journey.

1. NHS: 11 weeks pregnant guide
2. Government guidance: Combined test for Down’s, Edwards’ and Patau’s syndromes