London Mother Mulls Egg Freezing for Daughter Who Entered Puberty at 10 Months

Sophie Dumas, a mother from London, is exploring the possibility of having her daughter's eggs frozen after the child was diagnosed with central precocious puberty at 10 months old. The condition causes the brain to send out puberty-related signals much earlier than usual. Dumas said she had not suspected anything unusual about her daughter, Sienna, until a health visitor observed that the baby's breast tissue seemed larger than expected. She brought Sienna to a general practitioner, who referred them to paediatric endocrinologists. Following testing, Sienna received a diagnosis of central precocious puberty, or CPP, at 10 months of age. According to Dumas, Sienna had been a cheerful and healthy infant. The mother said she had not previously noticed breast buds. Because infants often have soft, chubby bodies and because she was breastfeeding, Dumas did not regard Sienna's appearance as out of the ordinary. The diagnostic process was difficult for the family, Dumas said. Sienna underwent what were called stimulation tests, a name Dumas came to dread. The procedure involved drawing blood to establish a baseline measurement of LH, a hormone that controls puberty, and then giving her a synthetic hormone so doctors could observe how her blood hormone levels responded across different periods. It required spending an entire day at the hospital. Sienna became so distressed that she perspired enough to dislodge the cannulas, and a vein gave way. Medical staff then had to collect blood from her heels using a pin prick, which Dumas described as extremely upsetting. X-rays were also needed to assess Sienna's bone age. Dumas said this was terrible because Sienna had to keep her hand flat and motionless while images were taken, something that is not easy for a 10-month-old. The only way Dumas could comfort her during procedures and tests was to breastfeed her in unusual positions, using a heavy blanket for cover. A few weeks later, the family learned that Sienna's tests indicated precocious puberty. Dumas said she had never heard of the condition and found herself urgently researching what it would mean for her daughter. She said the shortage of information was hard to handle. The only other parents she could find to speak with were in Facebook groups, but those parents had children aged seven or eight, so their experiences did not feel relevant. Dumas described the situation as isolating and said many questions remain, particularly about how she will explain the condition to Sienna. Doctors told the family that Sienna would require routine injections of a hormone blocker called a GnRH analogue to suppress the hormones that drive puberty. Sienna also had an MRI to check whether an underlying cause could be found. In some instances, central precocious puberty can be associated with brain abnormalities. Dumas said that possibility was frightening. Sienna's MRI came back clear, and she was diagnosed with central precocious puberty, which has no known cause in many children and occurs more often in girls. Without treatment, Sienna, now five, would have gone through puberty years before her peers. Although the condition is not life-threatening, doctors explained that early puberty can reduce final adult height because children grow quickly at first but their growth plates may mature sooner. Dumas said the emotional consequences for Sienna could be severe. She noted that any kind of difference can lead to bullying, isolation, and mental health struggles. Dumas said parents want their children to stay children as long as possible, preserving magical dreams and nurturing imaginations filled with fairies and princesses. She felt it was unfair that Sienna's body was trying to take away her youth. Dumas said CPP is not life-threatening but it is life-changing. She added that the family is very fortunate to have a healthy, happy daughter and cannot complain. Still, she said, it is heartbreaking when you have to hold your daughter down so doctors can draw blood or give injections while she cries and asks her mother to help and not let them hurt her. Dumas said she also cannot tell Sienna that the injections are needed to stop her from becoming sick, because that would not be true. Sienna now receives an injection every four weeks. Dumas said her daughter is sometimes completely fine with them, but there are still many times when she kicks, screams, and hides. As a parent, Dumas said, it is a labour of love, knowing the treatment is best for her, even though it hurts inside. The family has been told Sienna will likely stay on the hormone-blocking treatment until she is about 11 or 12, depending on her bone age and how she develops. Looking ahead, Dumas is considering whether egg freezing could expand Sienna's options when she is older. Dumas said she is researching the possibility in case the condition affects her fertility later. When Sienna was diagnosed, Dumas worried that she might not be able to have a family of her own if she wanted one, and that the choice could be taken from her. Dumas hopes the hormone blockers will prevent fertility problems. As Sienna gets older, some symptoms that cannot be treated are causing spots on her face in areas linked to hormones. Dumas said it is difficult to explain to her. Sienna has also faced teasing from school friends who thought she had chickenpox, which Dumas said makes her very sad. She said no one wants their child to be upset, especially because of something another person said. Sienna was confused because she did not know how to tell them the spots were a different kind, since she does not fully understand it herself. Dumas said she spoke to the teacher, who said she knew the spots were hormonal and would reassure Sienna and tell the other children that it is not their job to play doctor. For now, Dumas said she is determined that her daughter should enjoy her childhood. Her main worries include that young girls often wish to mature too soon, and the pressures involving matters like breast size. She worries that if Sienna later understands what would happen if she chose to stop treatment early in order to enter puberty, her mental maturity would not be ready for everything that comes with it. Puberty is an abstract idea for a child, Dumas said, making it complicated both for Sienna to grasp and for her to explain. Sienna remains a little girl who loves fairies and Disney princesses. Dumas said she would love to take her to Disneyland next year to preserve childhood wonder for as long as she can. Dumas advised any parent worried about anything, even if they fear looking or sounding neurotic, to seek medical advice and consider second opinions. She said their health visitor did not think the concern would be taken seriously, and without her noticing something Dumas never did, Sienna would not have been treated as early as she was.