Hisashi Hashikawa

Fecal Progestins and Estrogens for Endocrine Monitoring of Ovarian Cycle and Pregnancy in Sumatran Orangutan (Pongo abelii)

S. Kusuda, H. D. Putranto, O. Doi, 2007 .

Estrous cycle based on blood progesterone profiles and changes in vulvar appearance of Malayan tapirs (Tapirus indicus).

Y. Kawaguchi, J. Koizumi, S. Kusuda, 2007, The Journal of reproduction and development.

Noninvasive Monitoring of Reproductive Activity Based on Fecal Progestagen Profiles and Sexual Behavior in Koalas, Phascolarctos cinereus1

Hideki Ito, S. Kusuda, M. Ogata, 2009, Biology of reproduction.

Season- and Age-related Reproductive Changes Based on Fecal Androgen Concentrations in Male Koalas, Phascolarctos cinereus

Hideki Ito, S. Kusuda, O. Doi, 2013, The Journal of reproduction and development.

Puberty, ovarian cycle, pregnancy, and postpartum ovulation in captive Sichuan golden monkeys (Rhinopithecus roxellana) based on changes in urinary and fecal gonadal steroid metabolites.

Muren, S. Kusuda, O. Doi, 2017, Theriogenology.