Blastocyst culture means growing embryos in the laboratory for about five days, to the blastocyst stage, before one is transferred or frozen. It is part of an IVF or ICSI cycle, carried out at Level 2 ART clinics. This page explains what Blastocyst culture involves and lists the clinics in this directory whose own websites name it.
Also known as: blastocyst transfer, extended embryo culture
Clinics whose own website names it
152
Cities
49
States
16
Registered Level 2 / Level 1 / no level
98 / 13 / 41
Read from clinic websites
17 September 2026 to 19 September 2026
What blastocyst culture involves
In IVF, the UK fertility regulator, the HFEA, says “the embryos are allowed to develop for between two and six days.” A blastocyst is an embryo at the later end of that range: “Blastocyst stage embryos are selected on day five of their development.”
The HFEA explains the difference in its own terms: “The difference is that because blastocyst embryos have been able to develop for longer in the lab it's easier for the embryologist to select the embryos that are most likely to implant in the womb.”
Blastocysts can also be frozen. The HFEA says “Embryos can be frozen at different stages of their development – when they're just a single cell, at the two to eight cell stage or later in their development (called the blastocyst stage).” And genetic testing of embryos usually happens at this stage: “PGT-A is now mostly carried out at the blastocyst stage on day five or six.” See PGT.
What the regulator says about the downside
The HFEA states the downside plainly: “However, not all embryos that are left to the blastocyst stage will survive and in some cases a couple could have no embryos available to transfer to the womb. There's no way of knowing if the embryo had been transferred at the earlier cleavage stage, whether it could have continued to a successful pregnancy.”
When it is not used
The HFEA says “Some women or couples may be less likely to have a blastocyst transfer because the embryologist is concerned they'll end up with very few or no embryos if a lot of the embryos don't survive to the blastocyst stage.” Whether it is appropriate in a particular case is a clinical decision for the treating doctor. This directory does not make that judgement.
On how many to transfer, the HFEA says “It's best practice to have only one embryo put back.” Blastocyst culture sits inside IVF or ICSI; it is not a treatment on its own.
Registry level, and why it matters here
India’s ART (Regulation) Rules, 2022 set out two levels of clinic:
A Level 1 clinic is one where “only IUI is carried out as part of treatment”.
A Level 2 clinic is one where “all/advanced investigations, diagnostic and therapeutic procedures in ART are carried out”.
Because a Level 1 clinic may carry out only IUI, Blastocyst culture is Level 2 work.
That is why each clinic below shows the level the national registry records for it. Of the clinics listed below, 98 are registered as Level 2, 13 as Level 1, and 41 have no level in the registry extract. This directory does not know why a Level 1 clinic names Blastocyst culture. A clinic may send patients to a partner Level 2 laboratory, or its website may describe services it does not provide on site. Ask the clinic where the Blastocyst culture itself is done, and check its registration on the National ART & Surrogacy Registry.
Where Blastocyst culture is listed
These counts come from reading clinic websites. Of the 4,801 clinics in this directory, 910 have a website on record and 894 of those have been read; 458 named at least one treatment. The other 3,891 have no website on record, so there was nothing to read. A clinic missing from this list usually means we have not been able to look, not that it does not offer Blastocyst culture. Absence here is not evidence that a clinic does not offer it.
What this page does not publish.Success rates: this directory holds no outcome data for any clinic. Prices: none of the treatment records this directory holds carries one. Clinical advice: a directory is not a medical source.
Questions to ask every clinic about cost
If you are comparing quotes, ask each clinic the same questions, and ask for the answers in writing.
Is medication included in the quoted price, or billed separately?
How many cycles are likely in my case, not just the price of one?
What happens to the fee if a cycle is cancelled before egg collection?
Are ICSI, freezing, donor eggs or sperm and genetic testing each priced separately?
Is there a government programme I would be eligible for?
Can I have the quote in writing, itemised?
Questions
What is a blastocyst?
An embryo grown to about day five. The HFEA says “Blastocyst stage embryos are selected on day five of their development.”
Is there a downside to waiting until day five?
The HFEA says “not all embryos that are left to the blastocyst stage will survive and in some cases a couple could have no embryos available to transfer to the womb.”
Is blastocyst culture a separate treatment?
No. It is a way of running the laboratory part of an IVF or ICSI cycle. Ask a clinic whether it is included in the cycle price or charged separately.
Clinic data: each clinic's own website, as read by this directory; registry level from the National ART & Surrogacy Registry extract.
Editorial note. Registry details are sourced from the National ART & Surrogacy Registry and corroborated against what the clinic publishes. Opening hours are the clinic's own, cited to its website. Partner plans unlock more detail but never change the methodology. Success rates are not published here — read how we rank.
