If fertilization does not occur, the egg will detach itself and pass through and you will get a normal period.
eutrophication
eutrophication
Who was involved, What happened, When did it occur, Why did it occur, and How did it happen.
it HAPPENED TO occur in 1901.
it happened in 1946
It happened in 1961
it happened yesterday. where were you?
No, happened is the past tense of the verb "to happen", as in " the accident happened on my way to work"
It has happened and is still happening.
it happened on feb13 every year
it happened in japan
It happened because of a long preceded drought which happened during 1928-1930