Some chickens lay an egg almost every day, others every 1.5 to 2 days. Younger hens (called pullets if less than one year old) will lay smaller eggs at larger intervals until they reach maturity.
The caffeine effect. There are several reasons why women should limit their caffeine intake to less than 200 mg per day during pregnancy. Caffeine is a stimulant that influences the sympathetic nervous system to give you a buzz, sending messages to and from your brain more rapidly.
With most studies indicating that the effects of caffeine are related to amount of caffeine consumed, it would seem prudent for women contemplating pregnancy to limit caffeine consumption. Thus some experts have suggested an arbitrary threshold of less than 100 mg per day.