How to validate data input in PA30 (Maintain HR Master Data)

Dear Friends,

I am doing PA30 (Maintain HR Master Data) , entry Personnel no. (e.g. 1733), typing Infotype 2001 (Absences) and select Sty 1040 Maternity Leave  ( in SPRO -> Time Management -> Time Data Recording and Administration -> Absences -> Absence Catalog -> Define Absence Type ). then click Create button to Create Absence.

I want to validate data input when click Create button, If the Gender of 1733 = female  it can be created absence but when the gender is male it can't be processed.

Or we could show the message "Select Error"  after selecting Subtype Maternity Leave if the gender = male

I am sorry for my english, hoping your help.

Thanks in advance,

Ferry