3H-thymidine labelling pattern of preleptotene chromosome condensation stages in the fœtal sheep ovary J. M. LUCIANI, Jacqueline BÉZARD, Monique DEVICTOR-VUILLET and P. MAULÉON Ann. Biol. anim. Bioch. Biophys., 19 4B (1979) 1241-1250 DOI: 10.1051/rnd:19790808