In vitro fertilisation (IVF) and egg donation are important options in assisted reproduction, helping individuals and couples experiencing fertility difficulties. Understanding how these treatments work, their different stages and the importance of personalised care can help patients make informed decisions about their reproductive journey.
What Is IVF and How Does It Work?
IVF involves fertilising an egg with sperm in a specialised embryology laboratory before transferring the resulting embryo into the uterus.
A typical IVF cycle includes four stages: ovarian stimulation, egg retrieval, laboratory fertilisation and embryo transfer.
During ovarian stimulation, hormonal medications called gonadotrophins encourage the ovaries to produce multiple eggs. These medications are generally administered through daily injections for approximately 12 days.
Throughout this period, ultrasound examinations and occasional blood tests monitor ovarian response. Approximately 36 hours before egg retrieval, an hCG injection supports final egg maturation.
Treatment protocols are individualised according to factors including age, body weight, fertility history and previous IVF outcomes.
Egg Retrieval and Laboratory Fertilisation
Egg retrieval takes approximately 20 minutes and is performed under sedation. Using ultrasound guidance, the specialist collects eggs through a fine needle inserted into the ovarian follicles.
Following collection, embryologists identify the eggs and prepare them for fertilisation.
Conventional IVF involves combining prepared sperm with eggs in controlled laboratory conditions. When sperm concentration or motility is significantly reduced, intracytoplasmic sperm injection (ICSI) may be recommended. This technique involves injecting a single sperm directly into an egg.
Fertilised eggs develop into embryos, which are carefully monitored. By approximately day five, some embryos reach the blastocyst stage.
Embryo Transfer and the Next Steps
Embryo transfer usually occurs three or five days after egg collection, depending on embryo development and quality.
The procedure is performed under ultrasound guidance, generally without sedation. Usually, one embryo is transferred, although specific circumstances may justify transferring two.
During the following 12–14 days, progesterone supplementation may support implantation. Suitable additional embryos can be preserved through vitrification for future treatment.
When Is Egg Donation Recommended?
Egg donation offers another reproductive option for women who cannot successfully conceive using their own eggs.
It may be considered in cases involving premature ovarian insufficiency, reduced ovarian reserve, unsuccessful IVF cycles or certain genetic conditions.
The process involves fertilising donated eggs with sperm from a partner or donor. The resulting embryos may subsequently be transferred or frozen for future use.
Donor Screening and Personalised Treatment
Egg donors undergo medical assessments, including evaluations of reproductive history, infectious diseases and genetic conditions.
Matching may also consider physical characteristics shared between the donor and recipient.
Appropriate counselling helps individuals and couples understand the emotional, personal and practical considerations associated with egg donation.
Specialist Guidance Throughout Fertility Treatment
Both IVF and egg donation require careful planning, individualised monitoring and specialist expertise.
For personalised information about IVF, egg donation and available fertility treatment options, patients can contact Dr. George Christopoulos , Gynaecologist specialising in Reproductive Medicine.
