Marines must request paternity leave within 25 days after the birth of the baby. If deployed, the commander can approve paternity leave within 90 days of deployment and can authorize it outside that time period for extraordinary circumstances.
An injury to a nail may result in the loss of the nail. As long as the nail bed itself wasn't damaged, a lost nail should eventually grow back. Healthy fingernails grow at a rate of about 0.10mm per day, but toenails are slower, growing at only about one half to one third of a fingernail's rate.
If the nail bed is infected by fungi, it is required to completely heal the infection before having the nail grow back. Medications to inhibit nail growth, thus is used. The entire treatment and nail re-growth may take more than a year, and the nail will grow completely within 2 years.