Timeline: Rapist father case

A 56-year-old man from Sheffield who raped his two daughters over many years has been jailed for life with a minimum term of 19-and-a-half years.

The attacks resulted in 19 pregnancies, with nine of the children being born, two of whom died on the day of their birth. The other 10 pregnancies were miscarried or aborted.

The man's identity cannot be revealed for legal reasons.

The following are some of the key events in the case:

Late 1970s - Suspicions raised at daughters' non-accidental injuries.

1981 - Both daughters begin being sexually assaulted and then raped regularly.

1988-2002 - Doctors advised the women on a number of occasions to stop having children by the same father.

1988 - The women call Childline and ask for a guarantee that they can keep their children, but when one was not offered they end the call.

1990s - Family moves to several addresses in Sheffield and Lincolnshire.

1997 - The brother, who left home aged 15, alleges incest which leads to a police investigation, but no action is taken.

2004 - Family moves to South Yorkshire, where social services become involved. Abuse goes undetected.

February 2008 - Father rapes daughter for the last time.

June 2008 - Father is arrested.

November 2008 - Father is jailed for life with a minimum term of 19-and-a-half years.

May 2009 - The man wins a five-year reduction in his minimum jail term at the Court of Appeal. A judge said it should be reduced because the original sentence had been in line with those imposed for "serious murders".