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on day 5 vs at day 5

Both "on day 5" and "at day 5" can be correct, but they are used in different contexts. "On day 5" is used to refer to the fifth day in a sequence or timeline, while "at day 5" is less common and may be used in specific contexts where the preposition "at" is more appropriate.
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Explained by Vince
Editor at TextRanch

Last updated: November 16, 2024 • 1483 views

on day 5

This phrase is correct and commonly used in English to refer to a specific day in a sequence or timeline.

Use "on day 5" when referring to a specific day in a sequence or timeline, such as "on day 5 of the conference."

Examples:

  • We will meet on day 5 of the trip.
  • The results will be announced on day 5 of the competition.
  • On day 5, we will review the progress of the project.
  • The event is scheduled to take place on day 5 of the festival.
  • On day 5, the team will present their findings.
  • Assessment of COVID-19 progression on day 5 from symptoms onset. BMC Infect Dis. 2021 Aug 28;21(1):883. doi: 10.1186/s12879-021-06596-5.
  • Aug 11, 2022 ... Recommending that instead of quarantining if you were exposed to COVID-19, you wear a high-quality mask for 10 days and get tested on day 5.
  • It is on day 5 that both PT and bilirubin should return to normal value; their levels around 50-50 is a sign of liver failure and have a high predictive value ...
  • Sep 2, 2024 ... Paris 2024: Big moments on Day 5. First African nation medal in badminton - Olympic or Paralympic Games - goes to Nigeria's Mariam Eniola ...
  • Developmental stage on day-5 and fragmentation rate on day-3 can influence the implantation potential of top-quality blastocysts in IVF cycles with single ...
  • Jan 13, 2022 ... From Monday 17 January, people with COVID-19 in England can end their self-isolation after 5 full days, as long as they test negative on day 5 and day 6.
  • OBJECTIVE: Based on much published data, embryologists are confident that transferring an expanded or fully expanded blastocyst on day 5 will provide the ...
  • Step 1: Test on day 5. If the test result is negative, you can return to work on day 6, pending resolving symptoms and no fever for 24 hours. You must ...
  • Oct 2, 2023 ... Search Operations Continue on Day 5 for Missing Man Inside Rocky Mountain National Park. NPS Search and Rescue Team Members are in a ...
  • Jun 8, 2022 ... By day 4, his symptoms had resolved and he tested negative for COVID-19. After testing negative again on day 5, he ended his isolation from his ...

Alternatives:

  • on the 5th day
  • on the fifth day

at day 5

This phrase is correct but less common in English. It may be used in specific contexts where the preposition "at" is more appropriate.

Use "at day 5" in specific contexts where the preposition "at" is more suitable, such as "at day 5 of the event."

Examples:

  • The project is scheduled to be completed at day 5 of the timeline.
  • The meeting will take place at day 5 of the conference.
  • At day 5, the participants will receive their certificates.
  • The decision will be made at day 5 of the negotiation process.
  • At day 5, the team will present their final report.
  • We established a normal range for random glucose at day 5 of life in 687 non-diabetic neonates. Results: All 11 neonates with diabetes had hyperglycaemia ...
  • ... at day 5/6 (cleaved group B), were distinguished. The study flow chart is ... at day 5/6). ET, embryo transfer; NA, non-available data concerning the ...
  • Perinatal outcomes following transfer of human blastocysts vitrified at day 5, 6 and 7. J Exp Clin Assist Reprod. 2009 Oct 20:6:4. Authors.
  • Nov 12, 2018 ... transfer them at day 5 (1). The rationale for blastocyst trans- fer is to improve both uterine and embryonic synchronicity and enable self ...
  • Dec 27, 2021 ... For all those exposed, best practice would also include a test for SARS-CoV-2 at day 5 after exposure. If symptoms occur, individuals should ...
  • Mar 18, 2024 ... ... at day 5-7), and. At least 24 hours have passed since last fever without the use of fever-reducing medications, and. Symptoms (e.g., cough ...
  • May 15, 2019 ... At day 5, cells were harvested from 15ml of the supernatant by spinning at 1400rpm for 5 minutes; pellets were resuspended with 5ml medium ...
  • May 27, 2020 ... ... at day 5 of the trial — when both groups had received the same amount of treatment — which suggests that differences between the groups were ...
  • Mar 25, 2010 ... ... at Day 5 after saline or CIDR treatment, and in E2 and E2+P4 groups blood samples were collected after EB treatment. All animals were ...
  • Nov 1, 2002 ... Shift of Serum Osteocalcin Components between Cord Blood and Blood at Day 5 of Life · 1074 Accesses · 4 Citations · Metrics details ...

Alternatives:

  • on day 5
  • on the 5th day
  • on the fifth day

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