A woman from Texas in the United States gave birth to two sets of identical twin boys last Valentine's Day, a hospital in Houston announced last Monday.
A report from Reuters said the four brothers were delivered at 31 weeks to Tressa Montalvo, 36, via Cesarean section at The Woman's Hospital of Texas in Houston.
Montalvo, 36, and her husband Manuel Jr., 43, were not using any fertility drugs and had just hoped for a little brother or sister for their 2-year-old son, Memphis.
Montalvo was quoted as saying they planned the pregnancy and "just succeeded a little too much."
When she was 10 weeks pregnant, her physician told her she was having twins, and on a subsequent visit, the doctor detected a third heartbeat. The Montalvos were later informed they were having four babies - not quadruplets but two sets of twins.
Two boys shared one placenta and the two other boys shared another placenta. They were named Ace, Blaine, Cash and Dylan (in order of birth).
The hospital said this occurence is one-in-70 million of its kind.