| | Gemini 8 / Frog Egg Package: G8-1 (Site not responding. Last check: 2007-10-26) |
 | | The objective of this experiment was to determine the effects of subgravity on development in a gravity-oriented biological system, by determining the effect of weightlessness on the ability of fertilized frog eggs to divide normally, and to differentiate and form a normal embryo. |
 | | Several dozen frogs were injected with pituitary gland extract 48 hours prior to launch to ensure ovulation at the desired time, and the best eggs from two were selected for flight and fertilized by immersion in a sperm suspension made by maceration of frog testes in spring water. |
 | | Early stages of cleavage (2, 8, 16, 32 and 64 cells) were successfully obtained; however, the later cleavage and developmental stages were not reached. |
| lifesci.arc.nasa.gov /lis/Experiment_App/G8_1.html (479 words) |