A femur length that is shorter than expected can also be a soft marker for certain genetic conditions, such as trisomy 21 (Down syndrome), trisomy 13 (Patau syndrome), and trisomy 18 (Edward’s syndrome). 14 июн. 2021 г. The baby’s head was measuring large—above the 95th percentile for her gestational age. Meanwhile, her femurs were measuring small—below the 5th percentile for her gestational age. The doctor went on to say this indicated a strong likelihood of some kind of skeletal dysplasia.
Why is baby’s femur measuring small?
The femur length should be measured with the bone perpendicular to the ultrasound beam and with epiphyseal cartilages visible, but not included in the measurement. The presence of a short femur may be associated with aneuploidy, intrauterine growth restriction and short limb dysplasia.
What does a short femur length mean?
Short femur length was defined as length below the 10th percentile for gestational age and was considered isolated when both the estimated fetal weight and abdominal circumference were above the 10th percentile for gestational age.
Can femur measurements be wrong?
Errors in ultrasound-measured femur lengths can be shown to result from the focal characteristics of the equipment as well as the orientation and distance of the bone from the transducer. These differences can produce errors in estimation of gestational age as large as ten weeks.
What does short femur length mean in third trimester?
During the third trimester a very short femur may indicate a bone dysplasia and the work-up should be the same as in the second trimester. A short femur may correspond to dwarfism of late development, a growth-retarded foetus or constitutional shortness.
How much does your baby’s femur bone measure?
She is measuring at around 5 pounds 5 ounces. She also said that her femur bones were measuring short or behind for her gestational age. She told me not to worry about it but there are some genetic disorders that can cause this to happen. But the chances of that are slim. Needles to say i went right home and googled everything i could about it!
Is it normal for a baby to have a short femur length?
It can be frightening to hear that your baby has a short femur length, or another marker of concern. However, in most cases, the outcome is still a healthy, full-term baby.
What does it mean if my baby is measuring small?
In a nutshell. Your baby measuring small for your dates means that your baby’s size is a little smaller than what’s considered average for the stage of your pregnancy.
What is a short a femur used for?
A femur length that is shorter than expected has been used as a soft marker for certain genetic conditions, such as trisomy 21 (Down syndrome), trisomy 13 (Patau syndrome) and trisomy 18 (Edward’s syndrome).