Each individual knows how long a given phase will last.

The final phase of the disease may last from a few months to several years.

This phase may last weeks, months, or longer than a year.

That second phase would last six to nine months, or longer if necessary.

The final phase started in 1975, but lasted only until 1977.

The second phase lasted from 1540 until about 1547 or 1548.

It is difficult to predict how long each phase will last.

That phase of the session will last about three weeks.

This phase lasts for the first 30 days on center.

For each individual hair, this growing phase lasts 2 to 3 years.