2Marcelo MS, Cesar RE, Joaquim MG, et al. Relationship betweenfollicle size and ultrasound-guided transvaginal oocyte recovery [ J].Anim Reprod Sci, 2001, 67: 37-43.
3Qian Y, Shi WQ. Ding J T, et al. Effect of follicle size on Cumu-lus-expansion, in vitro fertilization and deveolpment of porcine follic-ularoocytes [J]. J Reprod Dev, 2001, 47: 145-152.
4Lonergan P. Monaghan P, Rizos D, et al. Effect of follicle size onbovine oocyte quality and developmental competence following matu-ration, fertilization and culture in vitro [ J ]. Mol Reprod Dev,1994, 37: 48-53.
5Seneda MM, Esper CR, Garcia JM, et al. Relationship betweenfollicle size and ultrasound guided transvaginal oocyte recovery [J].Anim Reprod Sci, 2001, 67: 37-43.