Hi,
Well chances of pregnancy are less likely especially if he had his hands washed our properly .
Also i would like to add that there are several other causes of missed period like stress, weight gain/loss, medication, illness, climate, hormonal imbalance, thyroid dysfunction to name a few .
Also you can miss your period due to anxiety , especially fear of pregnancy can also cause a missed period .
But still you may go in for a pregnancy test for ruling out pregnancy . As such the ideal time to test for pregnancy by HPT is 1-2 weeks from missed period .
Physician
B.A.M.S{Ayurveda Physician}Worked in various clinical departments like Medicine,ER,Gynae