One must also be careful not to anticipate the arrival of evening and thereby break the fast early. Married couples are forbidden to have intercourse whilst they are fasting. However, it is permissible after the fast has been broken in the evening. Deliberate seminal emission either through sexual contact or through no sexual contact invalidates the fast. The fast will not be broken by a kiss unless seminal fluid is discharged, however it is discouraged unless both are able to control their feelings.
Induced vomiting invalidates the fast.
However, if one cannot help it, the fast remains valid. In the event that one's fasting becomes void, one should continue the practice of those fasting - i.e. abstinence of food and drink etc. However, if sexual intercourse occurs during the fast of Ramadan, its expiation will be to fast for two consecutive months. If those who indulged in intercourse are unable to fast the two consecutive months then each should feed sixty poor people as an expiation. In the case of a women whose menstruation finishes during the day, there is no obligation upon her to practice the fast for the rest of that day.