Relationship between first trimester fetal crown-rump length and birth weight

Öz

Objective: We aimed to investigate the relationship between the difference between the expected and detected Crown-Rump Length (CRL) values ​​at the 11^th to 14^th weeks of the gestation and the birth weight of the newborn.

Material and Method: Our study was performed retrospectively with 1361 pregnancies who applied to our hospital for the first trimester screening test between 2013 and 2016 at their 11^th to 14^th gestational weeks. Patients were studied in three groups according to the difference between the expected and the determined CRL size. Group A (n: 266) was conducted if the CRL was smaller than expected (difference between expected and detected CRL size is 2 to 6 days), Group B (n: 695) was conducted if the CRL was normal (difference is 1 day less, equal or more than 1 day), Group C (n: 400) was conducted if the CRL was bigger than expected (the difference is 2-6 days less). The difference between the detected CRL values and the abnormal birth weight relation was assessed.

Results: The birth weight of the newborn was detected statistically difference between only two groups (between Group A and C, between Group B and C). According to this, the birth weight of Group C cases (3534,57 ± 461,76 g) was statistically higher than Group A (3271,37 ± 486,94 g) (p = 0.0001). The birth weight of Group C cases (3534,57 ± 461,76 g) was significantly higher than Group B (3307,56 ± 352,51 g) (p = 0.0001). There were statistically significant LGA fetuses in Group C (p = 0.0001). The highest LGA ratio was found in Group C (14.5%); and the lowest LGA rate in Group B (2.6%).

Conclusion: Detection of expected large or small values in CRL size during early gestation period should be a warning signal in terms of abnormal birth weight complications and these should be followed up more strictly by antenatal follow up.

Anahtar Kelimeler

• Crown-Rump Length,newborn birth weight,perinatal outcomes

Birinci trimester fetal baş popo mesafesi ile doğum ağırlığı arasındaki ilişki

Öz

Amaç: Çalışmamızda 11-14. gebelik haftaları arasında beklenen ve saptanan BPM değerleri arasındaki fark ile yenidoğanın doğum ağırlığı arasındaki ilişkiyi araştırmayı amaçladık.

Gereç ve Yöntem: 2013 - 2016 yılları arasında, 11-14. Gebelik haftasına sahip olup ilk trimester tarama testi için başvuran 1361 gebe çalışmaya dahil edildi. Hastalar beklenen ve saptanan BPM boyutu arasındaki farka göre üç grupta incelendi. Son adet tarihine (SAT) göre hesaplanan gebelik haftası, BPM ölçümü ile saptanan gebelik haftasından 2-6 gün fazla ise Grup A (n:266), SAT’a göre gebelik haftası BPM’ye göre hesaplanan gebelik haftasından 1 gün az, eşit ya da 1 gün fazla ise Grup B (n:695), SAT’a göre hesaplanan gebelik haftası BPM ölçümü ile saptanan gebelik haftasından 2-6 gün az ise Grup C (n:400) olarak adlandırıldı. Saptanan BPM değerleri arasındaki fark ile anormal doğum ağırlığı ilişkisi değerlendirildi.

Bulgular: Yenidoğanın doğum ağırlığının Grup A ile C ve Grup B ile C arasında istatistiksel anlamda farklılık gösterdiği tespit edildi. Buna göre Grup C olguların doğum ağırlığı (3534,57±461,76 g), Grup A olgulardan (3271,37±486,94 g) istatistiksel olarak daha fazla idi (p =0.0001). Grup C olguların doğum ağırlığı (3534,57±461,76 g) Grup B olgularından (3307,56±352,51 g) istatistiksel anlamda daha fazla idi (p =0.0001). Grup C de Grup B’den (p=0.0001) ve Grup C de Grup A dan istatistiksel anlamda daha fazla LGA bebek görüldü (p=0.014).

Sonuç: Erken fetal büyüme döneminde BPM boyutunda beklenenden büyük ya da küçük değerlerin saptanması makrozomi ve düşük doğum ağırlığının (LBW) öngörülmesi açısından uyarıcı bir işaret olabilir ve bu gebeler daha sıkı antenatal takibe alınmalıdır.

Anahtar Kelimeler

• CRL,Anormal doğum ağırlığı,Düşük doğum ağırlığı,İlk trimester

Kaynakça

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