Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: You’ll soon be able to track how active your sex life is using your iPhone thanks to a forthcoming update. Apple's iOS 9 will let people track when, and how often they have sex, as well as letting women log their menstrual cycle. The company has previously come under fire for ignoring the importance of female customers and this will be redressed when the revamped HealthKit rolls out in autumn. The update was announced by Apple’s Vice President of Software Engineering, Craig Federighi at the company's Worldwide Developers Conference (WWDC) conference yesterday. He said users will be able to track how much water they drink, UV exposure and how long they sit still for, as well as their reproductive health -  but didn’t provide any further details.HealthKit update unveiled at Apple's Worldwide Developers ConferenceScreenshots suggest feature will let users monitor sex and menstruationCompany has previously come under fire for ignoring female customersFeatures will roll out with the iOS 9 update coming in autumn 
 Question:A slide showing a category in _ for 'menstruation' flashed up briefly on screen during the presentation.

HealthKit