An 18-year-old man who twice had sex with his underaged girlfriend, and also got her pregnant, was on Monday sentenced to 15 months' probation.

In addition to the probation term, he was also ordered by the court to perform 100 hours of community service. His parents also have to pay a $5,000 bond to ensure his good behaviour.

The girl, who was 15 at the time, had to abort a 14-week old foetus in January this year after her mother found out about the pregnancy and made a police report.

The couple had sex in January and October 2013 at the staircase landing of a HDB block in Chai Chee Street. They have been in a steady relationship since Feb 2012 after attending the same secondary school together.

The man, then 17, had pleaded guilty last month to one charge of underaged sex, with another taken into consideration.

He could have been jailed for 10 years, fined, or both.