Around 30 female employees from Rohto Pharmaceutical Co. in Osaka are listening intently as Sakae Goto, a fertility specialist, gives a presentation at the drugmaker's first in-house seminar on the topic.

"Eggs start 'aging' when (women) reach around 35," Goto, who runs a fertility care clinic in Takatsuki, Osaka Prefecture, tells the participants.

She goes on to suggest that they see a specialist to obtain the right information on what they should do if they want to get pregnant.