M. Perez

A multicentred phase III comparative study of two hormonal contraceptive preparations given once-a-month by intramuscular injection. II. The comparison of bleeding patterns. World Health Organization Task Force on Long-Acting Systemic Agents for Fertility Regulation.

A. Pinol, D. Machin, B. Buscà, 1989, Contraception.

Introduction of cyclofem once-a-month injectable contraceptive in Mexico.

J. Garza-flores, G. Pérez-palacios, R. Barrios, 1998, Contraception.

Routine drug utilization in perimenopausal women living in Jaca (Spain)

M. J. Hernández, M. Perez, 2009 .