Time relationships in frog ovulation

✍ Scribed by Wright, Paul A.

• Publisher: John Wiley and Sons
• Year: 1950
• Tongue: English
• Weight: 523 KB
• Volume: 114
• Category: Article
• ISSN: 0022-104X
• DOI: 10.1002/jez.1401140303

✦ Synopsis

In recent tests with excised ovaries of R a m pipiens (Wright, '45), it was found that ov-ulation in vitro during March usually begins within 8 to 10 hours after the experiment is started and terminates within 24 to 28 hours. I n December, ovulation does not commence until 1 2 to 14 hours hut ceases in 28 hours. The progress of ovulation between these limits follows a signioid pattern, the greatest response being achieved between the 14th and 18th hours of the test in March, and between the 18th and 22nd hours in December. I n obtaining these data, bits of ovary from normal adult frogs were placed in pituitary solutions and left undisturbed for. the full 28 hours. It seemed of considerable importance to ascertain ' h i d d by a grant from tlie Horace 11. Rackham School of Graduate Studies,