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Haibel GK, Perkins NR. Real-time ultrasonic biparietal diameter of second trimester Suffolk and Finn sheep fetuses and prediction of gestational age. Theriogenology. 1989;32(5):863-9doi: 10.1016/0093-691x(89)90474-3.
Haibel, G. K., & Perkins, N. R. (1989). Real-time ultrasonic biparietal diameter of second trimester Suffolk and Finn sheep fetuses and prediction of gestational age. Theriogenology, 32(5), 863-9. https://doi.org/10.1016/0093-691x(89)90474-3
Haibel, G K, and Perkins, N R. "Real-time ultrasonic biparietal diameter of second trimester Suffolk and Finn sheep fetuses and prediction of gestational age." Theriogenology vol. 32,5 (1989): 863-9. doi: https://doi.org/10.1016/0093-691x(89)90474-3
Haibel GK, Perkins NR. Real-time ultrasonic biparietal diameter of second trimester Suffolk and Finn sheep fetuses and prediction of gestational age. Theriogenology. 1989 Nov;32(5):863-9. doi: 10.1016/0093-691x(89)90474-3. PMID: 16726732.
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Theriogenology. 1989 Nov;32(5):863-9. doi: 10.1016/0093-691x(89)90474-3.

Real-time ultrasonic biparietal diameter of second trimester Suffolk and Finn sheep fetuses and prediction of gestational age.

Theriogenology

G K Haibel, N R Perkins

Affiliations

  1. Department of Veterinary Clinical Sciences College of Veterinary Medicine The Ohio State University Columbus, OH 43210 USA.

PMID: 16726732 DOI: 10.1016/0093-691x(89)90474-3

Abstract

Six Suffolk fetuses of known gestational age were examined every other day from Day 43 to Day 96 of gestation using transabdominal real-time ultrasound. Biparietal diameter (BPD) was measured on symmetrical fetal head images. The relationship between days gestational age (GA) and mean BPD in millimeters is described by the equation: [GA = 22.5 + 1.81 BPD]. Repeated ultrasound examination of 9 Finn ewes between 35 and 95 d of gestation revealed the relationship: [GA = 21.4 + 1.85 BPD]. Biparietal diameters were determined for 56 Suffolk X Hampshire fetuses which ranged from 41 to 77 d of gestation. The predicted fetal age using the Suffolk equation was within 1 d of the recorded age for 22 56 , +/-2 d for 34 56 , and +/-3 d for 44 56 fetuses.

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