Cottesloe, Royal National Theatre, South Bank, London SE1 (0171-452 3000) 7.30pm
Another three-hander tackling science head-on, this time from a real scientist. After a succession of novels, Carl Djerassi, who synthesised the Pill in 1951, has turned his hand to a play. An Immaculate Misconception - which looks at the latest in-vitro fertilisation treatments - promises to be an alternative to the usual fluff of the Edinburgh Festival Fringe, which is now under way.
C Two, St Columba's by the Castle (Venue 4), Johnston Terrace, Edinburgh (0131-225 5105) 1.50pm