Demands for contraceptive pills tripled after the extended bank holiday, which began with Will and Kate's wedding, according to a survey by National Health Center in UK.
NHS Northamptonshire said that the statistics showed demand at pharmacies for Emergency Hormonal Contraception, the 'morning after pill' has increased threefold.
"It was a beautifully warm weekend in Northamptonshire and there were street parties as well as house parties to celebrate Will and Kate's wonderful wedding," the Daily Mail quoted Heidi King, who helps deliver sexual health and contraception awareness campaigning, as saying.
"And we probably shouldn't underestimate those two kisses on the palace balcony," she added.
King also added that it was their job to see that while people are enjoying themselves, they are also taking care of themselves.
"Of course it's our job to make sure that while people enjoy themselves, they are also looking after themselves and their partners," she said.
"That's why NHS Northamptonshire is giving out wristbands and information to young people over the summer to promote our free C Card scheme, which they can sign up to and get free condoms from over 200 outlets in the county.
"Whatever else they say, these figures suggest some people may not be thinking enough about their contraceptive needs," King said.
And the trust's statisticians are now on the lookout to see whether the 'Royal wedding effect' continued into the honeymoon period.