Does exposure of preovulatory oocytes to ultrasonic radiation affect reproductive performance?
Ultrasonography of preovulatory oocytes has been reported to lead to reduced litter size in rats. Because of the growing popularity of ultrasound-guided follicular aspiration in human in vitro fertilization programs, further study of ultrasonic radiation's effect on the preovulatory oocyte is warranted. We used 106 virgin Sprague-Dawley rats which, on the evening of proestrus, received ultrasonic radiation of sham treatment after the onset of the luteinizing hormone (LH) surge. No differences were found between control (C) and experimental (US) animals in pregnancy rate, number of corpora lutea, implantations, pups, and mean pup and placental weights at autopsy on day 22 of pregnancy. Ultrasonic radiation applied to meiotically active, preovulatory oocytes did not affect the reproductive performance of these rats.
Williams
S R
SR
Department of Reproductive Biology, Case Western Reserve University College of Medicine, University Hospital of Cleveland, Ohio 44106.
Rothchild
I
I
Wesolowski
D
D
Austin
C
C
Speroff
L
L
D000818:Animals; D005260:Female; D005498:Follicular Phase / Q000528:radiation effects*; D007986:Luteinizing Hormone / Q000378:metabolism; D008297:Male; D009865:Oocytes / Q000528:radiation effects*; D011247:Pregnancy; D051381:Rats; D011919:Rats, Inbred Strains; D012098:Reproduction / Q000528:radiation effects*; D014463:Ultrasonography / Q000009:adverse effects*
D007986:Luteinizing Hormone