On 7th November 2017 EggDonationFriends and PreGen, fertility clinic from Spain, organized and presented a free educational webinar about embryo transfer protocols during fertility treatment with in vitro fertilization. The webinar touched the subject of day 3 and day 5 embryo transfer and the difference between them.
PreGen – the webinar’s presenter
The webinar was presented by PreGen, a fertility centre that is a part of Vistahermosa hospital where professor Rueda is a director. This Spanish clinic has over 34 years of experience in the field of ART and does over 1,650 IVF cycles a year. Their average success rate is reported at 67%. PreGen offers a wide range of infertility treatments including oocyte donation, IVF for same sex parents, single women, embryo donation, PGS & PGD.
What is important for many patients, PreGen offers fertility treatments to women with max. age 50 and without any age limitations for men. Also, it offers much more than the British fertility clinics: assisted hatching, ICSI, embryo culture, time-lapse technology and even overnight accommodation for your oocyte retrieval appointment in Spain.
The webinar’s presenter was Dr. Carmen Avilés Salas who is a gynecologist specializing in reproduction at the Reproduction Unit of Clínica Vistahermosa. Dr. Avilés is a member of Spanish Society of Gynaecology and Obstetrics (SEGO) and Spanish Society of Fertility (SEF). We had the pleasure to have Dr. Avilés onboard for our webinar project.
Embryo transfer – how does it work?
If you are new to IVF, you should know that all embryos are assigned grades. This is done by the embryologist at the clinic. Their assessment is done based on the number of developed cells, the evenness of embryo growth and the degree of its fragmentation. The embryos with highest grade are usually chosen for transfer. How many embryos can you have transferred? The number depends on a few factors:
- the number of existing embryos,
- the patient’s age
- local legal regulations
- and other factors determined by the doctor.
British, Australian and Canadian patients can have a max. number of two embryos transferred. There are some exceptions allowed in non-typical cases. However, in American clinics, women under 40 may have multiple embryos transferred. Such procedure should be based on the doctor’s diagnosis of the patient’s condition.
It has been found in the studies that embryos which have reached the blastocyst stage in the lab usually have a higher chance of implanting successfully in the woman’s uterus. Doctors know that not all embryos will form the blastocyst outside of their natural environment – the womb. However, it is possible they could form a blastocyst inside the uterus.
Day 3 or day 5 embryo transfer?
It is completely natural that you want the best possible treatment option for and your partner, finally see those two lines on the pregnancy test and have a healthy baby. Also, it is completely natural that you have many questions and doubts. EggDonationFriends team understands that and aims to assist, educate and inform fertility patients who use our platform.
EggDonationFriends do receive a lot of questions about the issue of whether it is more beneficial to transfer blastocysts rather than early 3 day embryos. The most common questions are:
- How many day 3 embryos make it to blastocyst?
- What are 3 day embryos success rates?
- What are 5 day embryos success rates?
- Does the clinic perform day 3 and day 5 embryo transfers?
- What are the risks of day 3 embryo transfer?
- What are the risks of day 5 embryo transfer? (identical twins/complications such as monochorionic twins or monoamniotic twins)
- What is the difference between day 3 and day 5 embryo transfer?
These questions and many more were answered by Dr. Avilés during the webinar. During the presentation you could find out what the doctors’ recommendations are for day 3 or day 5 embryo transfer and which one is better in what circumstances. This is certainly a decision that requires careful diagnosis of the patient’s case and careful thought on the side of the doctor.
The presentation took approximately 40 minutes. During that time all attendees were able to type their questions in the chat section. After the presentation Dr. Avilés opened Q&A session (which lasted approx. 15 min.) where the questions asked by attendees could be answered by our expert. The webinar took about 1h – 1h 10 min. All unanswered questions will be addressed and answered by Dr. Aviles and published in this article at a later date. If you missed the webinar live, you can watch it again here or on EggDonationFriends YouTube channel.