** Referred friends must use your personal link when purchasing the service, and must be new customers to 23andMe. An Amazon.com Gift Card (the "Reward") is earned when a kit is shipped to the referred customer: for a referral of a Health + Ancestry Personal Genetic Service, Reward valued at twenty dollars (US$20); for a referral of an Ancestry Personal Genetic Service, Reward valued at ten dollars (US$10). Only one Reward is earned per customer referred, regardless of the number of kits purchased, with the exception of the following: for a referral of three (3) or more Ancestry Personal Genetic Service items in one order, Reward valued at twenty dollars (US$20). Purchases must be completed within 30 days of referral link activation. Rewards will be sent on a bi-monthly basis. Rewards may be sent in increments of ten dollar (US $10) denominations. See Terms and Conditions for more details.