Countries around the world marked the world’s population reaching 7 billion Monday with lavish ceremonies for newborn infants symbolizing the milestone and warnings that there may be too many humans for the planet’s resources.

 While demographers are unsure exactly when the world’s population will reach the 7 billion mark, the U.N. is using Monday to symbolically mark the day. A string of festivities are being held worldwide, with a series of symbolic 7-billionth babies being born.

The Philippines greeted with excitement one of the symbolic 7 billionth babies in the world shortly after midnight Sunday in a hospital in Manila, local media reported Monday.

It’s a baby girl with 5.5-pound. Philippine Health Secretary Enrique Ona said they will submit the baby’s name and time of birth to the World Health Organization to see if the baby is indeed the world’s seventh billionth.

The Philippines is the 12th most populous country in the world with 94.9 million people, according to the UN Population Fund (UNFPA)’s State of the World Population Report.

Filipina mother Camille holds her newborn baby girl named Danica Camacho, the Philippines’ symbolic “seven billionth baby” who is part of the United Nations’ seven billion global population projection, in Fabella Maternity hospital in Manila Oct 31, 2011.

Qatar is the fastest growing country and Moldova the fastest shrinking country