4. Take steps to regulate your period. If your period is irregular and you have seen your doctor to determine that there are no major problems, you can take certain measures to help your period become more regular.
aptitude (plural aptitudes) 1  Natural ability to acquire knowledge or skill. 2  The condition of being suitable.
The definition I like is that intelligence is the ability to learn or understand or to deal with new or trying situations ... also : the skilled use of reason (7)*. I have heard some people misuse the word smart to mean knowledgeable. That is like confusing velocity with distance.