英语听力精选进阶版 14391（在线收听）

 Travel company tells Danes to have sex on holiday

Vocabulary

birth rate

number of births in a particular period of time in a specific place

concerned

worried

sexologist

expert in human sexual behaviour

menstrual cycle

the repeated process of changes in which a woman's body prepares to become pregnant

fertile

able to have children

child-friendly holiday

holiday which is suitable for children