Valentine’s Day CAS – 29w3d
Today, February 14, 2026, Valentine’s Day, was all about love, patience, and a little bit of rushing. Sammy and I woke up around 6am, thinking the clinic opened at 9am. When I rechecked, it was actually 8am, first come first serve. So we scrambled, booked Grab, and arrived at Marikina OB GYN Ultrasound Clinic around 8:30am. The doctor wasn’t there yet, but the assistants were already moving with such an organized system that even waiting felt okay. The sonologist arrived at 9am, and by 10:30am, it was finally our turn. Two hours of waiting, but worth it.
I felt nervous before laying down on the bed, my mind racing with all the what-ifs. The Congenital Anomaly Scan (CAS) is one of the most detailed ultrasounds in pregnancy. It checks the baby’s organs, bones, and overall development to rule out major structural problems like heart defects, kidney issues, or cleft lip. Even at 29 weeks, the scan still gives valuable information about growth and anatomy.
When the screen lit up, I saw him. His heartbeat was steady at 159 bpm. His face, his tiny hands and feet, all there.
The sonologist went through each part: brain structures, spine, heart chambers, stomach, kidneys, bladder, umbilical cord, limbs. Everything appeared normal. No congenital anomaly seen at the time of scan. Sammy was called in after the measurements, and I saw the proud look on his face as he watched our baby boy.
One moment that really shocked me was when I saw his feet. Just a few weeks ago they looked so small, but now they’re so big. That explains why his kicks feel so strong lately. I can already see my tummy move from my point of view whenever he pushes. It’s amazing to connect what I feel with what I saw on the screen.
What the Measurements Mean
Growth and Biometry
BPD (Biparietal Diameter): 7.40 cm – width of the baby’s head, consistent with 29w5d.
HC (Head Circumference): 26.67 cm – head size, aligned with 29w.
AC (Abdominal Circumference): 24.83 cm – tummy size, matched 29w.
FL (Femur Length): 5.16 cm – thigh bone, slightly smaller, closer to 27w5d.
EFW (Estimated Fetal Weight): 1216 ± 184 g (2 lbs 12 oz) – at the 15th percentile, meaning baby is smaller than average but still within normal range.
Brain and Nervous System
Cerebellum: 3.41 cm – matches 28w5d, reassuring for brain growth.
Posterior Nuchal Fold: 0.39 cm – normal thickness, rules out certain chromosomal issues.
Cisterna Magna: 0.49 cm – fluid space behind the brain, normal.
Ventricles, Choroid Plexus, Midline structures – all appeared normal.
Heart and Chest
Four-chamber view: Normal – confirms proper heart structure.
Outflow tracts: Intact – blood flow through major vessels is normal.
Cardio-thoracic ratio: 44% – heart size compared to chest size, within normal range.
Abdomen and Organs
Stomach bubble: Present – baby is swallowing amniotic fluid, normal.
Kidneys: Right 3.31 x 1.87 cm, Left 3.49 x 2.06 cm – both normal.
Bladder: Fluid-filled – shows kidneys are working.
Placenta and Amniotic Fluid
Placenta: Anterior, Grade II, High-lying – normal maturity, safe position.
AFI (Amniotic Fluid Index): 18.08 cm – adequate fluid, normal range is 8–24 cm.
Bones and Limbs
Humerus: Left 4.76 cm, Right 4.58 cm
Radius: Left 3.85 cm, Right 3.65 cm
Ulna: Left 4.01 cm, Right 3.94 cm
Femur: Left 5.19 cm, Right 5.16 cm
Tibia: Left 4.67 cm, Right 4.61 cm
Fibula: Left 4.76 cm, Right 4.65 cm
Foot length: Left 5.73 cm, Right 5.43 cm
Fingers and toes: All present and normal
These bone measurements confirm symmetry and normal development.
Sex
Male, confirmed again during the scan.
Estimated Date of Confinement (EDC)
Based on my last menstrual period, the EDC was April 29, 2026. The ultrasound adjusted it slightly to May 3, 2026, based on fetal biometry. This small difference is common and not concerning. Doctors usually stick to the original EDC unless the difference is more than two weeks.
After the Scan
After the CAS, we rushed to Marikina Valley Medical Center to see Dr. Purugganan, worried because she’s only there until noon. Luckily, we made it before 11am. We sat down with Dra. Katrina and asked her a million questions about my night shifts, my approaching EDD, and my glucose results. She looked at my labs and said everything passed. She even wondered if my OGTT at 8 weeks was really accurate since it was so high back then, but now everything’s fine. Another sigh of relief. Another answered prayer.
Looking Ahead
Out of curiosity and excitement, I even asked Gemini to generate what our baby might look like as a newborn and at 1 year old, based on the ultrasound and our photos. Of course, it’s just AI imagination, but it made me smile. I can’t wait to see him personally, to hold him, and to watch him grow.
I am very thankful for my husband, because he keeps on supporting us even if it’s hard. Time, money, and everything I need, he’s always there. After the appointments, we ate outside, did grocery shopping, and went back home. He’s now sleeping as I write this blog. I thank the Lord that everything is normal and our baby is growing well. Just a few weeks more. Mommy will be strong for you.















