A small amount of purified protein derivative (PPD) solution is injected just under the first layer of skin of your inner forearm.
We find extremely long-lived modes of spin precession, named ' persistent precessing domains ' (PPD) at the lowest achievable temperatures.
Also known as PPD, it can affect any woman who is pregnant, has recently delivered a baby, weaned a child from breastfeeding, or had a miscarriage.
While experts are uncertain what causes PPD, the hormonal changes of pregnancy are thought to play a significant role.
Typically, PPD is treated with a combination of talk therapy and antidepressants.